[ mal-uh-kos-truh-kuh n ]
/ ˌmæl əˈkɒs trə kən /


belonging or pertaining to the crustacean subclass Malacostraca, which includes the lobsters, shrimps, crabs, etc.


a malacostracan crustacean.

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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for malacostracan

British Dictionary definitions for malacostracan


/ (ˌmæləˈkɒstrəkən) /


any crustacean of the subclass or group Malacostraca, including lobsters, crabs, woodlice, sand hoppers, and opossum shrimps

adjective Also: malacostracous

of, relating to, or belonging to the Malacostraca

Word Origin for malacostracan

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