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[kruh-stey-shuh n] /krʌˈsteɪ ʃən/
any chiefly aquatic arthropod of the class Crustacea, typically having the body covered with a hard shell or crust, including the lobsters, shrimps, crabs, barnacles, and wood lice.
belonging or pertaining to the crustaceans.
Origin of crustacean
1825-35; < New Latin Crustace(a) (neuter plural) hard-shelled ones (see crust, -acea) + -an Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for crustacean
Contemporary Examples
Historical Examples
  • “This is a magnificent specimen of the crustacean period,” he declared.

    'Me-Smith' Caroline Lockhart
  • This crustacean tube a thousand feet long solved the matter.

    James Watt Andrew Carnegie
  • Its punishment was simply that it was a Sacculina—that it was a Sacculina when it might have been a crustacean.

  • Nature has willed that the crustacean should not long remain an invalid.

    The Ocean World: Louis Figuier
  • Crabs and lobsters may be regarded as the chiefs or lords of the crustacean tribes.

    The Ocean World: Louis Figuier
  • A beetle, but with the shell of a crustacean instead of mere chitin.

  • In the substance of this polyp lives a crustacean, the nature of which Mons.

    Animal Parasites and Messmates P. J. Van Beneden
  • A second later he had swung it between himself and the crustacean.

    The Forgotten Planet Murray Leinster
  • Philadelphia boasts a much superior culture in the crustacean line.

    Unicorns James Huneker
British Dictionary definitions for crustacean


any arthropod of the mainly aquatic class Crustacea, typically having a carapace hardened with lime and including the lobsters, crabs, shrimps, woodlice, barnacles, copepods, and water fleas
of, relating to, or belonging to the Crustacea
Word Origin
C19: from New Latin crūstāceus hard-shelled, from Latin crūsta shell, crust
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for crustacean

1835, from Crustacea the class name. As an adjective, 1858 (earlier was crustaceous, 1640s).

Online Etymology Dictionary, © 2010 Douglas Harper
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crustacean in Science
Any of various widespread arthropods of the class Crustacea that live mostly in water and have a hard shell, a segmented body, and jointed appendages. Crustaceans include crabs, lobsters, shrimp, barnacles, and copepods.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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crustacean in Culture
crustacean [(kru-stay-shuhn)]

A class of arthropods with shells.

Note: Crabs, lobsters, shrimp, and crayfish are crustaceans.
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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