Answer :
Biology : Any one of a large group of animals (such as snails and clams) that have a soft body without a backbone and that usually live in a shell. Or
Full Definition : Any of a large phylum (Mollusca) of invertebrate animals (as snails, clams, or squids) with a soft unsegmented body usually enclosed in a calcareous shell; broadly : shellfish
Full Definition : Any of a large phylum (Mollusca) of invertebrate animals (as snails, clams, or squids) with a soft unsegmented body usually enclosed in a calcareous shell; broadly : shellfish