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Meaning of malacostracan

mal•a•cos•tra•can

Pronunciation: (mal"u-kos'tru-kun), [key]
— adj.
  1. belonging or pertaining to the crustacean subclass Malacostraca, which includes the lobsters, shrimps, crabs, etc.
—n.
  1. a malacostracan crustacean.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.