Definition of

Mollusk

  1. (noun, animal) invertebrate having a soft unsegmented body usually enclosed in a shell

via WordNet, Princeton University

Synonyms of Mollusk

mollusc, shellfish

Origin of the word Mollusk

  1. 1783, from Fr. mollusque, from Mod.L. Mollusca, order name, adopted by Linn?us 1758 from L. mollusca, neut. pl. of molluscus "thin-shelled," from mollis "soft," from PIE base *mel-/*mol-/*ml- "grind." Linn?us applied the word to a heterogeneous group of invertebrates, not originally including mollusks with shells; the modern scientific … more

via Online Etymology Dictionary, ©2001 Douglas Harper

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