genus Synchytrium ge·nus·sync·hytrium uncommon noun 1. simple parasitic fungi including pond scum parasites SynonymsSynchytriumgenus Synchytrium Related words Broader terms fungus genus Parts Synchytriaceae Part of pond-scum parasitepotato wart fungus WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.