Crust

krust, n. the hard rind or outside coating of anything: the outer part of bread: covering of a pie, .: ( geol. ) the solid exterior of the earth.— v.t. to cover with a crust or hard case.— v.i. to gather into a hard crust.— adj. Crustāt′ed , covered with a crust.— n. Crustā′tion , an adherent crust.— adv. Crust′ily .— n. Crust′ine .— adj. Crust′y , of the nature of or having a crust, as port or other wine: having a hard or harsh exterior: hard: snappy: surly. [O. Fr.,—L. crusta , rind.]