| Noun | 1. | Chlorophyceae - algae distinguished chiefly by having flagella and a clear green color, their chlorophyll being masked little if at all by other pigments Chlorophyta, division Chlorophyta - large division of chiefly freshwater eukaryotic algae that possess chlorophyll a and b, store food as starch, and cellulose cell walls; classes Chlorophyceae, Ulvophyceae, and Charophyceae; obviously ancestral to land plants order Ulvales, Ulvales - an order of protoctist order Volvocales, 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 class - (biology) a taxonomic group containing one or more orders |