calico clam: Meaning and Definition of

cal'ico clam"

Pronunciation: [key]
  1. any marine bivalve mollusk of the genus Macrocallista, esp. M. nimbosa, having a smooth, thick, rounded shell marked with violet-brown or lilac spots or streaks.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.