Crusta

‖n. pl. [ Neut. pl. of NL. crustaceus pert. to the crust or shell, from L. crusta the hard surfsce of a body, rind, shell. ] (Zool.) One of the classes of the arthropods, including lobsters and crabs; -- so called from the crustlike shell with which they are covered. [ 1913 Webster ]

☞ The body usually consists of an anterior part, made up of the head and thorax combined, called the cephalothorax, and of a posterior jointed part called the abdomen, postabdomen, and (improperly) tail. They breathe by means of gills variously attached to some of the limbs or to the sides the body, according to the group. They are divisible into two subclasses, Entomostraca and Malacostraca, each of which includes several orders. [ 1913 Webster ]

a. (Zool.) Of or pertaining to the Crustacea; crustaceous. -- n. An animal belonging to the class Crustacea. [ 1913 Webster ]

a. Pertaining to crustaceology. [ 1913 Webster ]

n. One versed in crustaceology; a crustalogist. [ 1913 Webster ]

n. [ Crustacea + -logy. ] That branch of Zoology which treats of the Crustacea; malacostracology; carcinology. [ 1913 Webster ]

a. [ NL. crustaceous. See crustacea. ] 1. Pertaining to, or of the nature of, crust or shell; having a crustlike shell. [ 1913 Webster ]

2. (Zool.) Belonging to the Crustacea; crustacean. [ 1913 Webster ]

n. The state or quality of being crustaceous or having a crustlike shell. [ 1913 Webster ]

a. Relating to a crust. [ 1913 Webster ]