Dictionary
crus•ta•cean
Pronunciation: (kru-stā'shun), [key]—
n.
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.
—
adj.
belonging or pertaining to the crustaceans.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.