Wing"-shell` (?), n. (Zoöl.) (a) Any one of various species of marine bivalve shells belonging to the genus Avicula, in which the hinge border projects like a wing. (b) Any marine gastropod shell of the genus Strombus. See Strombus. (c) Any pteropod shell.

Wing"-shell` (?), n. (Zoöl.) (a) Any one of various species of marine bivalve shells belonging to the genus Avicula, in which the hinge border projects like a wing. (b) Any marine gastropod shell of the genus Strombus. See Strombus. (c) Any pteropod shell.