%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 ]

a. Pertaining to crustalogy. [ 1913 Webster ]

n. One versed in crustalogy. [ 1913 Webster ]

n. [ L. crusta shell + -logy. ] Crustaceology. [ 1913 Webster ]

a. [ L. crustatus, p. p. of crustare, fr. crusta. See Crust. ] Covered with a crust; as, crustated basalt. [ 1913 Webster ]

n. An adherent crust; an incrustation. Pepys. [ 1913 Webster ]

n. [ Cf. OF. décrustation. ] The removal of a crust. [ 1913 Webster ]

a. [ L. incrustatus, p. p. See Incrust. ] Incrusted. Bacon. [ 1913 Webster ]

v. t. To incrust. [ R. ] Cheyne. [ 1913 Webster ]

n. [ L. incrustatio: cf. F. incrustation. See Incrust. ] [ 1913 Webster ]

1. The act of incrusting, or the state of being incrusted. [ 1913 Webster ]

2. A crust or hard coating of anything upon or within a body, as a deposit of lime, sediment, etc., from water on the inner surface of a steam boiler. [ 1913 Webster ]

3. (Arch.) A covering or inlaying of marble, mosaic, etc., attached to the masonry by cramp irons or cement. [ 1913 Webster ]

4. (Fine Arts) Anything inlaid or imbedded. [ 1913 Webster ]

v. t. [ See Ob-, and Crustated. ] To incrust; to harden. [ Obs. ] Dr. H. More. [ 1913 Webster ]

a. Half crustaceous; partially crustaceous. [ 1913 Webster ]