What is a genus of marine gastropods in which the shell has the outer lip dilated into a broad wing. It includes many large and handsome species commonly called conch shells, or conchs. See Conch called?

strombus — A genus of marine gastropods in which the shell has the outer lip dilated into a broad wing. It includes many large and handsome species commonly called conch shells, or conchs. See Conch. (Webster's 1913.)