Crustacea

krus-tā′shi-a, n.pl. a large cla of Arthropod animals, almost all aquatic, including crabs, lobsters, shrimps, sand-hoppers, wood-lice, water-fleas, barnacles, acorn-shells, .— n. Crustā′cean , one of the crustacea.— adj. Crusta ceo log′ical .— ns. Crustaceol′ogist ; Crustaceol′ogy , the science which treats of the crustacea.— adjs. Crustā′ceo us , Crustā′cean , pertaining to the crustacea, or shellfish.