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or mollusc

[mol-uh sk] /ˈmɒl əsk/
any invertebrate of the phylum Mollusca, typically having a calcareous shell of one, two, or more pieces that wholly or partly enclose the soft, unsegmented body, including the chitons, snails, bivalves, squids, and octopuses.
Origin of mollusk
1775-85; < French mollusque < New Latin Mollusca; see Mollusca
Related forms
molluskan, molluscan
[muh-luhs-kuh n] /məˈlʌs kən/ (Show IPA),
adjective, noun
mollusklike, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for mollusc


any invertebrate of the phylum Mollusca, having a soft unsegmented body and often a shell, secreted by a fold of skin (the mantle). The group includes the gastropods (snails, slugs, etc), bivalves (clams, mussels, etc), and cephalopods (cuttlefish, octopuses, etc)
Derived Forms
molluscan, (US) molluskan (mɒˈlʌskən) adjective, noun
mollusc-like, (US) mollusk-like, adjective
Word Origin
C18: via New Latin from Latin molluscus, from mollis soft
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for mollusc

see mollusk.



1783, mollusque (modern spelling from 1839), from French mollusque, from Modern Latin Mollusca (see Mollusca), the phylum name. Related: Molluscuous; molluscan.

Online Etymology Dictionary, © 2010 Douglas Harper
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mollusc in Science
mollusk or mollusc
Any of numerous invertebrate animals of the phylum Mollusca, usually living in water and often having a hard outer shell. They have a muscular foot, a well-developed circulatory and nervous system, and often complex eyes. Mollusks include gastropods (snails and shellfish), slugs, octopuses, squids, and the extinct ammonites. Mollusks appear in the fossil record in the early Cambrian Period, but it is not known from what group they evolved.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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