mollusk

n. invertebrate animal with a soft body and a hard shell (i.e. oysters, mussels, snails, cuttlefish, etc.), mollusc

The molluscs (British spelling) or mollusks (American spelling) are members of the very large and diverse phylum Mollusca. Molluscs include a wide variety of animals such as clams and snails, squid and octopus, which are well-known and valued by humans either as seafood or for their decorative shells. Molluscs live in a wide variety of habitats, in the oceans, on land and in freshwater.
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Noun
1. invertebrate having a soft unsegmented body usually enclosed in a shell
(synonym) mollusc, shellfish
(hypernym) invertebrate
(hyponym) scaphopod
(member-holonym) Mollusca, phylum Mollusca
(part-meronym) carapace, shell, cuticle

(n.)
One of the Mollusca.
  

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