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mollusk

[mol-uh sk] /ˈmɒl əsk/
noun
1.
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.
Also, mollusc.
Origin
1775-1785
1775-85; < French mollusque < Neo-Latin Mollusca; see Mollusca
Related forms
molluskan, molluscan
[muh-luhs-kuh n] /məˈlʌs kən/ (Show IPA),
adjective, noun
mollusklike, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for molluscs
  • Cephalopods are the only molluscs with a closed circulatory system.
Word Origin and History for molluscs

mollusk

n.

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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molluscs in Science
mollusk or mollusc
  (mŏl'əsk)   
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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12
17
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