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|Noun||1.||class Chrysophyceae - all the yellow-green algae having flagella of unequal length|
Chrysophyta, division Chrysophyta - mostly freshwater eukaryotic algae having the chlorophyll masked by brown or yellow pigment; yellow-green and golden-brown algae and diatoms: Xanthophyceae, Chrysophyceae, Bacillariophyceae; some classification systems superseded or subsumed by Heterokontophyta
class - (biology) a taxonomic group containing one or more orders