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crust |
Also found in: Dictionary/thesaurus, Medical, Acronyms, Idioms, Wikipedia, Hutchinson | 0.04 sec. |
crustOutermost solid part of the Earth, essentially composed of a range of igneous and metamorphic rock types. In continental regions, the crust is made up chiefly of granitic rock, whereas the composition of the ocean floor corresponds mainly to that of basalt and gabbro. On average, the crust extends 22 mi (35 km) downward from the surface to the underlying mantle, from which it is separated by the Mohorovicic discontinuity (the Moho). The crust and top layer of the mantle together form the lithosphere. |
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| The jackdaws were eating pie- crust, and the magpie was drinking gravy out of a patty-pan. It is my own crust of bread that I eat; and though that crust is but a poor one, and sometimes actually a maggoty one, it has at least been EARNED, and therefore, is being put to a right and lawful use. The emphasis was helped by the speaker's hair, which bristled on the skirts of his bald head, a plantation of firs to keep the wind from its shining surface, all covered with knobs, like the crust of a plum pie, as if the head had scarcely warehouse-room for the hard facts stored inside. |
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crust
