noun
1. : any free-floating filamentous alga of the family Zygnemataceae ; especially : spirogyra
2. : the mass of tangled filaments formed by any pond scum on stagnant or quiet waters
noun
1. : any free-floating filamentous alga of the family Zygnemataceae ; especially : spirogyra
2. : the mass of tangled filaments formed by any pond scum on stagnant or quiet waters
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012