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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 De·cap·o·da prop. n. pl.
 1. Zool. The order of Crustacea which includes the shrimps, lobsters, crabs, etc.
 Note: ☞ They have a carapace, covering and uniting the somites of the head and thorax and inclosing a gill chamber on each side, and usually have five (rarely six) pairs of legs. They are divided into two principal groups: Brachyura and Macrura. Some writers recognize a third (Anomura) intermediate between the others.
 2. Zool. A division of the dibranchiate cephalopods including the cuttlefishes and squids. See Decacera.
 ◄ ►

From: WordNet (r) 2.0

 Decapoda
      n 1: lobsters; crayfish; crabs; shrimps; prawns [syn: order
            Decapoda]
      2: squids and cuttlefishes [syn: order Decapoda]