Webster's English Dictionary

Enter the word to look up:

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