mollusk
mol.lusk or mol.lusc \'ma:l-*sk\ n [F mollusque, fr. NL Mollusca, phylum name, fr. L, neut. pl. of ]molluscus soft, fr. mollis : any of a large phylum (Mollusca) of invertebrate animals (as snails or c lams) with a soft unsegmented body usu. enclosed in a calcareous shell; broadly : SHELLFISH