'Polystoma' definitions:

Definition of 'Polystoma'

From: GCIDE

Polystomata \Pol`y*stom"a*ta\, n. pl. [NL., from Gr. poly`s many + ?, ?, mouth.] (Zool.) A division of trematode worms having more two suckers. Called also Polystomea and Polystoma. [1913 Webster]