Zygnemataceae zyg·ne·ma·taceae uncommon noun 1. pond scums: common freshwater algae forming green slimy masses Synonymsfamily Zygnemataceae Related words Broader terms protoctist family Parts Zygnematales Part of Zygnemapond scumgenus Spirogyra WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
