protoctist order

Definitions of protoctist order

1. noun

   the order of protoctists
   types:

   Heterotrichales, order Heterotrichales

   yellow-green algae with simple or branching filaments; comprising the single family Tribonemaceae

   Laminariales, order Laminariales

   in some classifications coextensive with family Laminariaceae: marine brown algae of cold or polar seas

   Ulvales, order Ulvales

   an order of protoctist

   Volvocales, order Volvocales

   chiefly freshwater green algae; solitary or colonial

   Chlorococcales, order Chlorococcales

   unicellular green algae that reproduce by spores

   Oedogoniales, order oedogoniales

   simple or branched filamentous freshwater green algae

   Charales, order Charales

   small order of macroscopic fresh and brackish water algae with a distinct axis: stoneworts

   type of:

   order

   (biology) taxonomic group containing one or more families