types:
substance
the real physical matter of which a person or thing consists
item,
point
a distinct part that can be specified separately in a group of things that could be enumerated on a list
butt
the part of a plant from which the roots spring or the part of a stalk or trunk nearest the roots
base,
basis
the most important or necessary part of something
unit
an individual or group or structure or other entity regarded as a structural or functional constituent of a whole
member
anything that belongs to a set or class
dregs
the most worthless or undesirable part of something
discourse
extended verbal expression in speech or writing
word
a unit of language that native speakers can identify
syllable
a unit of spoken language larger than a phoneme
lexeme
a minimal unit (as a word or stem) in the lexicon of a language; `go' and `went' and `gone' and `going' are all members of the English lexeme `go'
morpheme
minimal meaningful language unit; it cannot be divided into smaller meaningful units
formative
minimal language unit that has a syntactic (or morphological) function
name
a language unit by which a person or thing is known
phone,
sound,
speech sound
(phonetics) an individual sound unit of speech without concern as to whether or not it is a phoneme of some language
sign
a fundamental linguistic unit linking a signifier to that which is signified
chemistry
the chemical composition and properties of a substance or object
material,
stuff
the tangible substance that goes into the makeup of a physical object
phlogiston
a hypothetical substance once believed to be present in all combustible materials and to be released during burning
mixture
(chemistry) a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding)
atom
(physics and chemistry) the smallest component of an element having the chemical properties of the element
chemical element,
element
any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
activator
(biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription
substrate
the substance that is acted upon by an enzyme or ferment
element
one of four substances thought in ancient and medieval cosmology to constitute the physical universe
medium
an intervening substance through which something is achieved
medium
(biology) a substance in which specimens are preserved or displayed
fluid
a substance that is fluid at room temperature and pressure
volatile
a substance that changes readily from solid or liquid to vapor
essence
any substance possessing to a high degree the predominant properties of a plant or drug or other natural product from which it is extracted
accent
a detail or feature that adds visual emphasis to or contrasts with its surroundings