Ĕp'i-phrāgm, n.
(-frām), n. [Gr. ἐπιφράσσειν, to block up.] (Conch.) A membranaceous or calcareous body, by means of which some species of mollusks close the aperture of the shell during the time of hibernation.
(-frām), n. [Gr. ἐπιφράσσειν, to block up.] (Conch.) A membranaceous or calcareous body, by means of which some species of mollusks close the aperture of the shell during the time of hibernation.