'Fresh-water polyp' definitions:

Definition of 'Fresh-water polyp'

From: GCIDE

Polyp \Pol"yp\, n. [L. polypus, Gr. ?, ?, literally, many-footed; poly`s many + ?, ?, foot: cf. F. polype. See Poly- and Foot, and cf. Polypode, Polypody, Poulp.] (Zool.) (a) One of the feeding or nutritive zooids of a hydroid or coral. (b) One of the Anthozoa. (c) pl. Same as Anthozoa. See Anthozoa, Madreporaria, Hydroid. [Written also polype.] [1913 Webster]
Fresh-water polyp, the hydra.
Polyp stem (Zool.), that portion of the stem of a siphonophore which bears the polypites, or feeding zooids. [1913 Webster]