2 definitions found From WordNet (r) 2.0 [wn]: mollusk noun: invertebrate having a soft unsegmented body usually enclosed in a shell [syn: {mollusc}, {shellfish}] From The Collaborative International Dictionary of English v.0.44 [gcide]: Mollusk \Mol"lusk\, noun [F. mollusque, L. mollusca a kind of soft nut with a thin shell, fr. molluscus soft, mollis soft. See {Mollify}.] (Zo["o]l.) One of the Mollusca. [Written also {mollusc}.]

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