- mollusk, mollusc, shellfish - invertebrate having a soft unsegmented body usually enclosed in a shell
--1 is a kind of invertebrate
--1 is a member of Mollusca, phylum Mollusca
--1 has parts: carapace, shell, cuticle; shellfish
--1 has particulars:scaphopod; gastropod, univalve; chiton, coat-of-mail shell, sea cradle, polyplacophore; bivalve, pelecypod, lamellibranch; cephalopod, cephalopod mollusk