crust

crust is a Noun

Definition:

[1] The hard external coat or covering of anything; the hard exterior surface or outer shell; an incrustation; as, a crust of snow. I have known the statute of an emperor quite hid under a crust of dross. Addison. Below this icy crust of conformity, the waters of infidelity lay dark and deep as ever. Prescott.

[2] The hard exterior or surface of bread, in distinction from the soft part or crumb; or a piece of bread grown dry or hard.

[3] The cover or case of a pie, in distinction from the soft contents.

[4] The dough, or mass of doughy paste, cooked with a potpie; -- also called dumpling. Th` impenetrable crust thy teeth defies. Dryden. He that keeps nor crust nor crumb. Shak. They . . . made the crust for the venison pasty. Macualay.

[5] The exterior portion of the earth, formerly universally supposed to inclose a molten interior.

[6] The shell of crabs, lobsters, etc.

[7] A hard mass, made up of dried secretions blood, or pus, occurring upon the surface of the body.

[8] An incrustation on the interior of wine bottles, the result of the ripening of the wine; a deposit of tartar, etc. See Beeswing.