class

/klæs/

/klɑs/

Other forms: classes; classed; classing

If you attend school, you probably have a favorite class — a series of lectures or discussions where you can learn about a particular subject, like English, math, or economics.

The characteristic of being high quality or displaying elegance is also called class. Your snobby friend might glance around your favorite diner and say, "Let's go somewhere else. This place has no class." In society, class refers to a ranking system based on socio-economics, birth, education level, or a combination of those things. Your ancestors might have been working class, until your grandfather struck it rich.

Definitions of class

1. noun

   a collection of things sharing a common attribute
   “there are two classes of detergents”

   synonyms: category, family

   types:

   grammatical category, syntactic category

   (grammar) a category of words having the same grammatical properties

   paradigm, substitution class

   the class of all items that can be substituted into the same position (or slot) in a grammatical sentence (are in paradigmatic relation with one another)

   brass family

   (music) the family of brass instruments

   violin family

   (music) the family of bowed stringed instruments

   woodwind family

   (music) the family of woodwind instruments

   stamp

   a type or class

   sex

   either of the two categories (male or female) into which most organisms are divided

   declension

   a class of nouns or pronouns or adjectives in Indo-European languages having the same (or very similar) inflectional forms

   conjugation

   a class of verbs having the same inflectional forms

   denomination

   a class of one kind of unit in a system of numbers or measures or weights or money

   histocompatibility complex

   a family of fifty or more genes on the sixth human chromosome that code for proteins on the surfaces of cells and that play a role in the immune response

   case, grammatical case

   nouns or pronouns or adjectives (often marked by inflection) related in some way to other words in a sentence

   form class, part of speech, word class

   one of the traditional categories of words intended to reflect their functions in a grammatical context

   number

   the grammatical category for the forms of nouns and pronouns and verbs that are used depending on the number of entities involved (singular or dual or plural)

   person

   a grammatical category used in the classification of pronouns, possessive determiners, and verb forms according to whether they indicate the speaker, the addressee, or a third party

   gender, grammatical gender

   a grammatical category in inflected languages governing the agreement between nouns and pronouns and adjectives; in some languages it is quite arbitrary but in Indo-European languages it is usually based on sex or animateness

   tense

   a grammatical category of verbs used to express distinctions of time

   participant role, semantic role

   (linguistics) the underlying relation that a constituent has with the main verb in a clause

   type of:

   accumulation, aggregation, assemblage, collection

   several things grouped together or considered as a whole
2. noun

   people having the same social, economic, or educational status
   “the working class”

   “an emerging professional class”

   synonyms: social class, socio-economic class, stratum

   types:

   domain, world

   people in general; especially a distinctive group of people with some shared interest

   age class

   people in the same age range

   agriculture

   the class of people engaged in growing food

   brotherhood, fraternity, sodality

   people engaged in a particular occupation

   estate, estate of the realm, the three estates

   a major social class or order of persons regarded collectively as part of the body politic of the country (especially in the United Kingdom) and formerly possessing distinct political rights

   labor, labour, proletariat, working class

   a social class comprising those who do manual labor or work for wages

   lower class, underclass

   the social class lowest in the social hierarchy

   bourgeoisie, middle class

   the social class between the lower and upper classes

   booboisie

   class consisting of all those who are considered boobs

   commonality, commonalty, commons

   a class composed of persons lacking clerical or noble rank

   peasantry

   the class of peasants

   demimonde

   a class of woman not considered respectable because of indiscreet or promiscuous behavior

   underworld

   the criminal class

   yeomanry

   class of small freeholders who cultivated their own land

   caste

   a social class separated from others by distinctions of hereditary rank or profession or wealth

   caste

   (Hinduism) a hereditary social class among Hindus; stratified according to ritual purity

   upper class, upper crust

   the class occupying the highest position in the social hierarchy

   ninja

   a class of 14th century Japanese who were trained in martial arts and were hired for espionage and assassinations

   firing line

   the most advanced and responsible group in an activity

   immigrant class

   recent immigrants who are lumped together as a class by their low socioeconomic status in spite of different cultural backgrounds

   center

   politically moderate persons; centrists

   old school

   a class of people favoring traditional ideas

   market

   the customers for a particular product or service

   craft, trade

   people who perform a particular kind of skilled work

   fair sex, woman, womanhood

   women as a class

   Lords Spiritual, first estate

   the clergy in France and the heads of the church in Britain

   Lords Temporal, second estate

   the nobility in France and the peerage in Britain

   Commons, third estate

   the common people

   fourth estate

   the press, including journalists, newspaper writers, photographers

   labor force, labor pool

   the source of trained people from which workers can be hired

   lumpenproletariat

   (Marxism) the unorganized lower levels of the proletariat who are not interested in revolutionary advancement

   organized labor

   employees who are represented by a labor union

   petit bourgeois, petite bourgeoisie, petty bourgeoisie

   lower middle class (shopkeepers and clerical staff etc.)

   academe, academia

   the community or environment of colleges and universities

   Grub Street

   the world of literary hacks

   jati

   (Hinduism) a Hindu caste or distinctive social group of which there are thousands throughout India; a special characteristic is often the exclusive occupation of its male members (such as barber or potter)

   elite, elite group

   a group or class of persons enjoying superior intellectual or social or economic status

   aristocracy, gentry

   the most powerful members of a society

   people in power, ruling class

   the class of people exerting power or authority

   black market

   people who engage in illicit trade

   type of:

   people

   (plural) any group of human beings (men or women or children) collectively
3. noun

   (biology) a taxonomic group containing one or more orders
   types:

   Schizomycetes, class Schizomycetes

   a former classification

   Cyanophyceae, class Cyanobacteria, class Cyanophyceae

   photosynthetic bacteria found in fresh and salt water, having chlorophyll a and phycobilins; once thought to be algae: blue-green algae

   Sarcodina, class Sarcodina

   characterized by the formation of pseudopods for locomotion and taking food: Actinopoda; Rhizopoda

   Actinopoda, subclass Actinopoda

   heliozoans; radiolarians

   Rhizopoda, subclass Rhizopoda

   creeping protozoans: amoebas and foraminifers

   Ciliata, Ciliophora, class Ciliata, class Ciliophora

   class of protozoa having cilia or hairlike appendages on part or all of the surface during some part of the life cycle

   Infusoria, subclass Infusoria

   in some recent classifications, coextensive with the Ciliata: minute organisms found in decomposing infusions of organic matter

   Chrysophyceae, Heterokontae, class Chrysophyceae, class Heterokontae

   all the yellow-green algae having flagella of unequal length

   Xanthophyceae, class Xanthophyceae

   yellow-green algae

   Bacillariophyceae, Diatomophyceae, class Bacillariophyceae, class Diatomophyceae

   marine and freshwater eukaryotic algae: diatoms

   Phaeophyceae, class Phaeophyceae

   brown algae; mostly marine and littoral eukaryotic algae

   Cyclosporeae, class Cyclosporeae

   in more recent classifications superseded by the order Fucales

   Euglenophyceae, class Euglenophyceae

   coextensive with the division Euglenophyta

   Chlorophyceae, class Chlorophyceae

   algae distinguished chiefly by having flagella and a clear green color, their chlorophyll being masked little if at all by other pigments

   Ulvophyceae, class Ulvophyceae

   alternative name for the class Chlorophyceae in some classifications

   Charophyceae, class Charophyceae

   in some classifications: contains only the order Charales

   Rhodophyceae, class Rhodophyceae

   coextensive with the Rhodophyta: red algae

   Flagellata, Mastigophora, class Flagellata, class Mastigophora

   protozoa having flagella

   Zoomastigina, subclass Zoomastigina

   in some classifications considered a phylum of the kingdom Protista; holozoic or saprozoic flagellates

   Phytomastigina, subclass Phytomastigina

   plantlike flagellates containing chlorophyll; often considered unicellular algae

   Cryptophyceae, class Cryptophyceae

   motile usually brownish-green protozoa-like algae

   Sporozoa, class Sporozoa

   strictly parasitic protozoans that are usually immobile; includes plasmodia and coccidia and piroplasms and malaria parasites

   Telosporidia, subclass Telosporidia

   parasitic sporozoans that form spores containing one or more infective sporozoites

   Acnidosporidia, subclass Acnidosporidia

   a subclass of Sporozoa

   Cnidosporidia, subclass Cnidosporidia

   single-host parasites of lower vertebrates and invertebrates

   Ascidiaceae, class Ascidiaceae

   sometimes classified as an order: sea squirts

   Thaliacea, class Thaliacea

   small class of free-swimming tunicates; sometimes classified as an order

   Larvacea, class Larvacea

   small free-swimming tunicates; sometimes classified as an order

   Agnatha, superclass Agnatha

   superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys; hagfishes; some extinct forms

   Gnathostomata, superclass Gnathostomata

   comprising all vertebrates with upper and lower jaws

   Placodermi, class Placodermi

   extinct group of bony-plated fishes with primitive jaws

   Chondrichthyes, class Chondrichthyes

   cartilaginous fishes

   Holocephali, subclass Holocephali

   chimaeras and extinct forms

   Elasmobranchii, Selachii, subclass Elasmobranchii, subclass Selachii

   sharks; rays; dogfishes; skates

   Aves, class Aves

   (ornithology) the class of birds

   Archaeornithes, subclass Archaeornithes

   primitive reptile-like fossil birds of the Jurassic or early Cretaceous

   amphibia, class Amphibia

   the class of vertebrates that live on land but breed in water; frogs; toads; newts; salamanders; caecilians

   Reptilia, class Reptilia

   class of cold-blooded air-breathing vertebrates with completely ossified skeleton and a body usually covered with scales or horny plates; once the dominant land animals

   Anapsida, subclass Anapsida

   oldest known reptiles; turtles and extinct Permian forms

   Lepidosauria, subclass Lepidosauria

   diapsid reptiles: lizards; snakes; tuataras

   Archosauria, subclass Archosauria

   a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts

   Synapsida, subclass Synapsida

   extinct reptiles of the Permian to Jurassic considered ancestral to mammals

   Chelicerata, superclass Chelicerata

   spiders; scorpions; horseshoe crabs

   Arachnida, class Arachnida

   a large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of walking legs and no wings

   superclass Myriapoda

   used in some classifications to encompass the millipedes (Diplopoda) and centipedes (Chilopoda); formerly a large taxon including also the Pauropoda and Symphyla; the term Myriapoda now usually used synonymously with Diplopoda and limited to the millipedes

   Pauropoda, class Pauropoda

   an obscure class of minute arthropods with branched antennae and 8 to 10 pairs of legs

   Symphyla, class Symphyla

   small class of minute arthropods; unimportant except for the garden centipede

   Tardigrada, class Tardigrada

   in some classifications considered a separate phylum: microscopic arachnid-like invertebrates living in water or damp moss having 4 pairs of legs and instead of a mouth a pair of stylets or needlelike piercing organs connected with the pharynx

   Chilopoda, class Chilopoda

   arthropods having the trunk composed of numerous somites each bearing one pair of legs: centipedes

   Diplopoda, Myriapoda, class Diplopoda, class Myriapoda

   arthropods having the body composed of numerous double somites each with two pairs of legs: millipedes

   Mammalia, class Mammalia

   warm-blooded vertebrates characterized by mammary glands in the female

   Prototheria, subclass Prototheria

   echidnas; platypus

   Pantotheria, subclass Pantotheria

   generalized extinct mammals widespread during the Jurassic; commonly conceded to be ancestral to marsupial and placental mammals

   Metatheria, subclass Metatheria

   pouched animals

   Eutheria, subclass Eutheria

   all mammals except monotremes and marsupials

   Hyalospongiae, class Hyalospongiae

   sponges with siliceous spicules that have six rays; choanocytes are restricted to finger-shaped chambers

   Scyphozoa, class Scyphozoa

   coelenterates in which the polyp stage is absent or at least inconspicuous: jellyfishes

   Hydrozoa, class Hydrozoa

   coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes

   Actinozoa, Anthozoa, class Actinozoa, class Anthozoa

   a large class of sedentary marine coelenterates that includes sea anemones and corals; the medusoid phase is entirely suppressed

   Nuda, class Nuda

   ctenophores lacking tentacles; comprises one genus: beroe

   Tentaculata, class Tentaculata

   ctenophores have retractile tentacles

   Turbellaria, class Turbellaria

   free-living flatworms

   Trematoda, class Trematoda

   parasitic flatworms (including flukes)

   Cestoda, class Cestoda

   tapeworms

   Aphasmidia, class Aphasmidia

   one of two subgroups of Nematoda used in some classification systems

   Phasmidia, class Phasmidia

   one of two subgroups of Nematoda used in some classification systems

   Archiannelida, class Archiannelida

   a class of Annelida

   Oligochaeta, class Oligochaeta

   earthworms

   Polychaeta, class Polychaeta

   marine annelid worms

   Hirudinea, class Hirudinea

   hermaphroditic aquatic or terrestrial or parasitic annelids

   Scaphopoda, class Scaphopoda

   small class of bilaterally symmetrical marine forms comprising the tooth shells

   Gasteropoda, Gastropoda, class Gasteropoda, class Gastropoda

   snails and slugs and their relatives

   Opisthobranchia, subclass Opisthobranchia

   gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea hares

   Amphineura, subclass Amphineura

   a class of Gastropoda

   Polyplacophora, class Polyplacophora

   small class of marine mollusks comprising the chitons; sometimes considered an order of the subclass Amphineura

   Bivalvia, Lamellibranchia, class Bivalvia, class Lamellibranchia, class Pelecypoda

   oysters; clams; scallops; mussels

   Cephalopoda, class Cephalopoda

   octopuses; squids; cuttlefish; pearly nautilus

   Dibranchia, Dibranchiata, subclass Dibranchia, subclass Dibranchiata

   comprising all living cephalopods except the family Nautilidae: the orders Octopoda (octopuses) and Decapoda (squids and cuttlefish)

   Crustacea, class Crustacea

   class of mandibulate arthropods including: lobsters; crabs; shrimps; woodlice; barnacles; decapods; water fleas

   Malacostraca, subclass Malacostraca

   largest subclass of Crustacea including most of the well-known marine, freshwater, and terrestrial crustaceans: crabs; lobsters; shrimps; sow bugs; beach flies

   Entomostraca, subclass Entomostraca

   in some older classifications includes the Branchiopoda and Copepoda and Ostracoda and Cirripedia; no longer in technical use

   Branchiopoda, subclass Branchiopoda

   primitive aquatic mainly freshwater crustaceans: fairy shrimps; brine shrimps; tadpole shrimps; can shrimps; water fleas

   Copepoda, subclass Copepoda

   minute planktonic or parasitic crustaceans

   Ostracoda, subclass Ostracoda

   seed shrimps

   Cirripedia, subclass Cirripedia

   barnacles

   Onychophora, class Onychophora

   enigmatic small elongated wormlike terrestrial invertebrates of damp dark habitats in warm regions; distinct from the phylum Annelida; resemble slugs with legs and are sometimes described as the missing link between arthropods and annelids

   Hexapoda, Insecta, class Hexapoda, class Insecta

   insects; about five-sixths of all known animal species

   Exopterygota, Hemimetabola, subclass Exopterygota

   subclass of insects characterized by gradual and usually incomplete metamorphosis

   Asteroidea, class Asteroidea

   sea stars

   Ophiuroidea, class Ophiuroidea

   brittle stars and basket stars

   Ophiurida, subclass Ophiurida

   brittle stars

   Euryalida, subclass Euryalida

   basket stars

   Echinoidea, class Echinoidea

   sea urchins and sand dollars

   Crinoidea, class Crinoidea

   sea lilies

   Holothuroidea, class Holothuroidea

   class of echinoderms including the sea cucumbers

   Hominoidea, superfamily Hominoidea

   anthropoid apes and human beings

   Channidae, class Channidae

   snakeheads

   Osteichthyes, class Osteichthyes

   a class of fish having a skeleton composed of bone in addition to cartilage

   Crossopterygii, subclass Crossopterygii

   fishes having paired fins resembling limbs and regarded as ancestral to amphibians

   Dipnoi, subclass Dipnoi

   bony fishes of the southern hemisphere that breathe by a modified air bladder as well as gills; sometimes classified as an order of Crossopterygii

   Teleostei, subclass Teleostei

   large diverse group of bony fishes; includes most living species

   Anthoceropsida, class Anthoceropsida

   hornworts: in some classification systems included in the class Hepaticopsida

   Bryopsida, Musci, class Bryopsida, class Musci

   true mosses: bryophytes having leafy rather than thalloid gametophytes: comprises orders Andreaeales; Bryales; Dicranales; Eubryales; Sphagnales

   Hepaticae, Hepaticopsida, class Hepaticae, class Hepaticopsida

   liverworts: comprises orders Anthocerotales; Jungermanniales; Marchantiales; Sphaerocarpales

   Gymnospermae, Gymnospermophyta, class Gymnospermae, division Gymnospermophyta

   plants having naked seeds not enclosed in an ovary; in some systems considered a class (Gymnospermae) and in others a division (Gymnospermophyta); comprises three subdivisions (or classes): Cycadophytina (class Cycadopsida) and Gnetophytina (class Gnetopsida) and Coniferophytina (class Coniferopsida); in some classifications the Coniferophytina are divided into three groups: Pinophytina (class Pinopsida) and Ginkgophytina (class Ginkgopsida) and Taxophytina (class Taxopsida)

   Gnetophyta, Gnetophytina, Gnetopsida, class Gnetopsida, subdivision Gnetophytina

   gymnospermous flowering plants; supposed link between conifers and angiosperms; in some systems classified as a class (Gnetopsida) and in others as a subdivision (Gnetophytina or Gnetophyta)

   Cycadophyta, Cycadophytina, Cycadopsida, class Cycadopsida, subdivision Cycadophyta, subdivision Cycadophytina

   palmlike gymnosperms: includes the surviving order Cycadales and several extinct orders; possibly not a natural group; in some systems considered a class (Cycadopsida) and in others a subdivision (Cycadophytina or Cycadophyta)

   Pteridospermopsida, class Pteridospermopsida

   extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and allies

   Coniferophyta, Coniferophytina, Coniferopsida, class Coniferopsida, subdivision Coniferophytina

   cone-bearing gymnosperms dating from the Carboniferous period; most are substantial trees; includes the classes Pinopsida (subdivision Pinophytina) and Ginkgopsida (subdivision Ginkgophytina) and Taxopsida (subdivision Taxophytina) which in turn include the surviving orders Coniferales and Taxales (yews) and sometimes Ginkgoales as well as extinct orders such as Cordaitales (of the Carboniferous and Permian)

   Pinophytina, Pinopsida, class Pinopsida, subdivision Pinophytina

   most conifers: in some systems classified as a class (Pinopsida) and in others as a subdivision (Pinophytina); used in some classifications for one of five subdivisions of Gymnospermophyta

   Taxophytina, Taxopsida, class Taxopsida, subdivision Taxophytina

   yews: in some systems classified as a class (Taxopsida) and in others as a subdivision (Taxophytina) used in some classifications for one of five subdivisions of Gymnospermophyta

   Ginkgophytina, Ginkgopsida, class Ginkgophytina, class Ginkgopsida, subdivision Ginkgophyta, subdivision Ginkgophytina

   ginkgos: in some systems classified as a class and in others as a subdivision; used in some classifications for one of five subdivisions of Gymnospermophyta

   Angiospermae, Anthophyta, Magnoliophyta, class Angiospermae, division Anthophyta, division Magnoliophyta

   comprising flowering plants that produce seeds enclosed in an ovary; in some systems considered a class (Angiospermae) and in others a division (Magnoliophyta or Anthophyta)

   Dicotyledonae, Dicotyledones, Magnoliopsida, class Dicotyledonae, class Dicotyledones, class Magnoliopsida

   comprising seed plants that produce an embryo with paired cotyledons and net-veined leaves; divided into six (not always well distinguished) subclasses (or superorders): Magnoliidae and Hamamelidae (considered primitive); Caryophyllidae (an early and distinctive offshoot); and three more or less advanced groups: Dilleniidae; Rosidae; Asteridae

   Magnoliidae, ranalian complex, subclass Magnoliidae

   a group of families of trees and shrubs and herbs having well-developed perianths and apocarpous ovaries and generally regarded as the most primitive extant flowering plants; contains 36 families including Magnoliaceae and Ranunculaceae; sometimes classified as a superorder

   Liliopsida, Monocotyledonae, Monocotyledones, class Liliopsida, class Monocotyledonae, class Monocotyledones

   comprising seed plants that produce an embryo with a single cotyledon and parallel-veined leaves: includes grasses and lilies and palms and orchids; divided into four subclasses or superorders: Alismatidae; Arecidae; Commelinidae; and Liliidae

   Alismatidae, subclass Alismatidae

   one of four subclasses or superorders of Monocotyledones; comprises about 500 species in 14 families of aquatic and semiaquatic herbs

   Arecidae, subclass Arecidae

   one of four subclasses or superorder of Monocotyledones; comprises about 6400 species in 5 families of trees and shrubs and terrestrial herbs and a few free-floating aquatics including: Palmae; Araceae; Pandanaceae and Lemnaceae

   Commelinidae, subclass Commelinidae

   one of four subclasses or superorders of Monocotyledones; comprises about 19,000 species in 25 families of mostly terrestrial herbs especially of moist places including: Cyperaceae; Gramineae; Bromeliaceae; and Zingiberaceae

   Caryophyllidae, subclass Caryophyllidae

   a group of families of mostly flowers having basal or central placentation and trinucleate pollen (binucleate pollen is commoner in flowering plants); contains 14 families including: Caryophyllaceae (carnations and pinks); Aizoaceae; Amaranthaceae; Batidaceae; Chenopodiaceae; Cactaceae (order Opuntiales); Nyctaginaceae; Phytolaccaceae; corresponds approximately to order Caryophyllales; sometimes classified as a superorder

   Asteridae, subclass Asteridae

   a group of mostly sympetalous herbs and some trees and shrubs mostly with 2 fused carpels; contains 43 families including Campanulales; Solanaceae; Scrophulariaceae; Labiatae; Verbenaceae; Rubiaceae; Compositae; sometimes classified as a superorder

   Rosidae, subclass Rosidae

   a group of trees and shrubs and herbs mostly with polypetalous flowers; contains 108 families including Rosaceae; Crassulaceae; Myrtaceae; Melastomaceae; Euphorbiaceae; Umbelliferae

   Hamamelidae, subclass Hamamelidae

   a group of chiefly woody plants considered among the most primitive of angiosperms; perianth poorly developed or lacking; flowers often unisexual and often in catkins and often wind pollinated; contains 23 families including the Betulaceae and Fagaceae (includes the Amentiferae); sometimes classified as a superorder

   Dilleniidae, subclass Dilleniidae

   a group of families of more or less advanced trees and shrubs and herbs having either polypetalous or gamopetalous corollas and often with ovules attached to the walls of the ovary; contains 69 families including Ericaceae and Cruciferae and Malvaceae; sometimes classified as a superorder

   Liliidae, subclass Liliidae

   one of four subclasses or superorders of Monocotyledones; comprises 17 families including: Liliaceae; Alliaceae; Amaryllidaceae; Iridaceae; Orchidaceae; Trilliaceae

   Zygomycetes, class Zygomycetes

   class of fungi coextensive with subdivision Zygomycota

   Myxomycetes, class Myxomycetes

   the class of true slime molds; essentially equivalent to the division Myxomycota

   Acrasiomycetes, class Acrasiomycetes

   cellular slime molds; in some classifications placed in kingdom Protoctista

   Oomycetes, class Oomycetes

   nonphotosynthetic fungi that resemble algae and that reproduce by forming oospores; sometimes classified as protoctists

   Chytridiomycetes, class Chytridiomycetes

   a class of mostly aquatic fungi; saprophytic or parasitic on algae or fungi or plants

   Eumycetes, class Eumycetes

   category used in some classifications: coextensive with division Eumycota

   Deuteromycetes, class Deuteromycetes

   form class; coextensive with subdivision Deuteromycota

   Basidiomycetes, class Basidiomycetes

   large class of higher fungi coextensive with subdivision Basidiomycota

   Homobasidiomycetes, subclass Homobasidiomycetes

   category used in some classification systems for various basidiomycetous fungi including e.g. mushrooms and puffballs which are usually placed in the classes Gasteromycetes and Hymenomycetes

   Heterobasidiomycetes, subclass Heterobasidiomycetes

   category used in some classification systems for various basidiomycetous fungi including rusts and smuts

   Hymenomycetes, class Hymenomycetes

   used in some classifications; usually coextensive with order Agaricales: mushrooms; toadstools; agarics; bracket fungi

   Ascomycetes, class Ascomycetes

   large class of higher fungi coextensive with division Ascomycota: sac fungi

   Euascomycetes, subclass Euascomycetes

   category not used in many classification systems

   Hemiascomycetes, class Hemiascomycetes

   class of fungi in which no ascocarps are formed: yeasts and some plant parasites

   Plectomycetes, class Plectomycetes

   class of fungi in which the fruiting body is a cleistothecium (it releases spores only on decay or disintegration)

   Pyrenomycetes, class Pyrenomycetes

   class of fungi in which the fruiting body is a perithecium; includes powdery mildews and ergot and Neurospora

   Discomycetes, subclass Discomycetes

   a large and taxonomically difficult group of Ascomycetes in which the fleshy fruiting body is disklike or cup-shaped

   Gasteromycetes, Gastromycetes, class Gasteromycetes, class Gastromycetes

   fungi in which the hymenium is enclosed until after spores have matured: puffballs; earth stars; stinkhorn fungi

   Tiliomycetes, class Tiliomycetes

   category used in some systems to comprise the two orders Ustilaginales (smuts) and Uredinales (rusts)

   Filicinae, Filicopsida, class Filicinae, class Filicopsida

   ferns

   Psilopsida, Psilotatae, class Psilopsida, class Psilotatae

   whisk ferns; comprising the family Psilotaceae or Psilotatae: vascular plants with no roots, partial if any leaf differentiation, and rudimentary spore sacs

   Equisetatae, Sphenopsida, class Equisetatae, class Sphenopsida

   horsetails and related forms

   Lycopodiate, Lycopsida, class Lycopodiate, class Lycopsida

   club mosses and related forms: includes Lycopodiales; Isoetales; Selaginellales; and extinct Lepidodendrales; sometimes considered a subdivision of Tracheophyta

   Lycopodineae, class Lycopodineae

   alternative designation for the class Lycopsida

   type of:

   taxon, taxonomic category, taxonomic group

   animal or plant group having natural relations
4. verb

   arrange or order by classes or categories
   synonyms: assort, classify, separate, sort, sort out

   types:

   unitise, unitize

   separate or classify into units

   catalog, catalogue

   make an itemized list or catalog of; classify

   isolate

   separate (experiences) from the emotions relating to them

   refer

   think of, regard, or classify under a subsuming principle or with a general group or in relation to another

   reclassify

   classify anew, change the previous classification

   size

   sort according to size

   dichotomise, dichotomize

   divide into two opposing groups or kinds

   pigeonhole, stamp, stereotype

   treat or classify according to a mental stereotype

   group

   arrange into a group or groups

   grade

   determine the grade of or assign a grade to

   count, number

   put into a group

   regroup

   reorganize into new groups

   bracket

   classify or group

   chunk, collocate, lump

   group or chunk together in a certain order or place side by side

   batch

   batch together; assemble or process as a batch

   type of:

   categorise, categorize

   place into or assign to a category
5. noun

   education imparted in a series of lessons or meetings
   “flirting is not unknown in college classes”

   synonyms: course, course of instruction, course of study

   types:

   adult education

   a course (via lectures or correspondence) for adults who are not otherwise engaged in formal study

   art class

   a class in which you learn to draw or paint

   childbirth-preparation class

   a course that teaches pregnant women to use breathing and concentration and exercise techniques to use during labor

   correspondence course

   a course offered (by mail) by a correspondence school

   course of lectures

   a series of lectures dealing with a subject

   directed study

   a course of study that is supervised and controlled by a specialist in the subject

   elective, elective course

   a course that the student can select from among alternatives

   extension course

   a course offered as part of an extension service

   home study

   a course of study carried out at home rather than in a classroom

   industrial arts

   a course in the methods of using tools and machinery as taught in secondary schools and technical schools

   orientation, orientation course

   a course introducing a new situation or environment

   propaedeutic, propaedeutics

   a course that provides an introduction to an art or science (or to more advanced study generally)

   refresher, refresher course

   a course that reviews and updates a topic for those who have not kept abreast of developments

   required course

   a course that all students are required to take

   seminar

   a course offered for a small group of advanced students

   shop, shop class

   a course of instruction in a trade (as carpentry or electricity)

   workshop

   a brief intensive course for a small group; emphasizes problem solving

   life class

   an art class using a live human model

   type of:

   didactics, education, educational activity, instruction, pedagogy, teaching

   the activities of educating or instructing; activities that impart knowledge or skill
6. noun

   a body of students who are taught together
   “early morning classes are always sleepy”

   synonyms: course, form, grade

   types:

   master class

   a class (especially in music) given to talented students by an expert

   discussion section, section

   a small class of students who are part of a larger course but are taught separately

   type of:

   assemblage, gathering

   a group of persons together in one place
7. noun

   a body of students who graduate together
   “the class of '97”

   synonyms: year

   types:

   graduating class

   the body of students who graduate together this year

   senior class

   final grade or class in high school or college

   junior class

   penultimate class in high school or college

   sophomore class

   the second class in a four-year college or high school

   freshman class

   the first class in college or high school

   type of:

   assemblage, gathering

   a group of persons together in one place
8. noun

   elegance in appearance or behavior
   “she has a lot of class”

   type of:

   elegance

   a refined quality of gracefulness and good taste
9. noun

   a league ranked by quality
   “he played baseball in class D for two years”

   synonyms: division

   type of:

   conference, league

   an association of sports teams that organizes matches for its members