class Chytridiomycetes classc·hyt·ri·diomycetes uncommon noun 1. a class of mostly aquatic fungi; saprophytic or parasitic on algae or fungi or plants SynonymsChytridiomycetesclass Chytridiomycetes Related words Broader terms class Parts Mastigomycota Part of ChytridialesBlastocladiales WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.