• synonyms


[mal-uh-kos-truh-kuh n]
  1. belonging or pertaining to the crustacean subclass Malacostraca, which includes the lobsters, shrimps, crabs, etc.
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  1. a malacostracan crustacean.
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Origin of malacostracan

1825–35; < New Latin Malacostrac(a) order of crustacea (< Greek, neuter plural of malakóstrakos soft-shelled, equivalent to malak- malaco- + -ostrakos, adj. derivative of óstrakon shell (of mollusks, etc.); cf. ostracize) + -an
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for malacostracan

Historical Examples

  • The second antennae, mandibles and two pairs of maxillae may also be claimed as of malacostracan type.

    Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6


British Dictionary definitions for malacostracan


  1. any crustacean of the subclass or group Malacostraca, including lobsters, crabs, woodlice, sand hoppers, and opossum shrimps
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adjective Also: malacostracous
  1. of, relating to, or belonging to the Malacostraca
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Word Origin

C19: from New Latin, from Greek malakōstrakos, from malaco- + ostrakon shell
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