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|Noun||1.||class Oomycetes - nonphotosynthetic fungi that resemble algae and that reproduce by forming oospores; sometimes classified as protoctists|
class - (biology) a taxonomic group containing one or more orders
Mastigomycota, Mastigomycotina, subdivision Mastigomycota, subdivision Mastigomycotina - fungi in which the spores and gametes are motile; in some systems placed in the Phycomycetes group with the Zygomycota
order Peronosporales, Peronosporales - order of chiefly parasitic lower fungi: Albuginaceae and Peronosporaceae and Pythiaceae