'Physa' definitions:
Definition of 'physa'
From: WordNet
noun
Any member of the genus Physa
Definition of 'Physa'
From: GCIDE
- Physa \Phy"sa\, prop. n. [NL., fr. Gr. fy^sa a bellows.] (Zool.) A genus of fresh-water Pulmonifera, having reversed spiral shells. See Pond snail, under Pond. [1913 Webster]