Crust

krust, n. The hard, external covering of any- thing; any concretion. — v. To cover with a hard case, or crust; to incrust, envelop, — v. To gather into a hard crust to concrete or freeze at the surface. [OF. cntste, L. crusta, crust of bread cruaidh, hard, Gr. kruos, frost.] — Crust'y, a. Of the nature of erust hard of a harsh exterior or rough manner; surly; morose. — Crust'ily, adv.— Crustine , n. — Cnista'cea, -she-a, n. pi. One of the cla es of articulated animals, including lobsters, shrimps, and crabs, which have a crust-like shell covering the body and legs. — Crusta'cean, n. An animal of the cla Crustacea. — a. Pert, to, etc. — Crusta'ceol'ogy, n. Science of the Crusta- — cea malacostracology. [Gr. logos, discourse.] Crusta'ceo us, -shus, a. Pert, to, or having, a crust like shell crustacean.