Search Result for "physa": 
Wordnet 3.0

NOUN (1)

1. any member of the genus Physa;

The Collaborative International Dictionary of English v.0.48:

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]
WordNet (r) 3.0 (2006):

physa n 1: any member of the genus Physa