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crust

1. Geology the solid outer shell of the earth, with an average thickness of 30--35 km in continental regions and 5 km beneath the oceans, forming the upper part of the lithosphere and lying immediately above the mantle, from which it is separated by the Mohorovicić discontinuity
2. the dry covering of a skin sore or lesion; scab
3. Oenology a layer of acid potassium tartrate deposited by some wine, esp port, on the inside of the bottle
4. Biology the hard outer layer of such organisms as lichens and crustaceans

crust

The outermost solid layer of a terrestrial planet or a satellite, consisting of rock, ice, or a mixture of the two. See also Earth.

Crust

 

in plants, a complex of tissues on the surface of the stem and roots of woody plants, consisting of dead peridermal cells and parts of the bark. The crust forms as layers of periderm repeatedly form in the phloem. In the case of more or less concentric arrangement of peridermal layers, a ringed crust forms (as in mock orange and grapes); if the peridermal layers overlap, a scaly crust forms (as in oak). Depending on the nature of the depositing of crust, it falls from the surface of the tree in layers, ribbons, or scales. Crust usually forms late (in birch, pine, and oak when the tree is 25–35 years old); it protects the plant from excessive evaporation, sharp fluctuations of temperature, and other undesirable effects.

crust

[krəst]
(geology)
The outermost solid layer of the earth, mostly consisting of crystalline rock and extending no more than a few miles from the surface to the Mohorovičić discontinuity. Also known as earth crust.
(hydrology)
A hard layer of snow lying on top of a soft layer.
References in periodicals archive ?
| Piazza Cafe, Metropolitan Cathedral, Mount Pleasant, Liverpool The Royal Court's Famous Scouse consists of braised lamb with carrots, celery and potatoes served with beetroot, crusty roll and butter.
A versatile addition to any bread stand or food to go offer, Batched Brown Crusty Rolls are ideal as a multi-buy using Country Choice's large bread bag; they can be broken up and sold as singles; or they can be filled to order for the takeaway market.
Taking pride in its coffee, Crusty focuses only on the best Viennese coffee and serves Julius Meinl who has been making coffee for over 145 years!
There were crusty stones, a dirt floor, crumbling cement, and overhead timbers covered with active cobwebs.
Add them to your salad, mix them with sauteed vegetables and pasta, or layer them with lettuce, tomato, and onion between two slices of crusty whole-grain bread.
Engrossed in her task, she didn't notice the crusty old fisherman sitting quietly watching her.
The two thugs began shoving and hitting the crusty war veteran (who stands nearly six feet tall and weighs around 200 pounds).
This product has been proven to relieve ailments such as the stuffy nose and crusty secretions that often accompany a cold, the flu, allergies, or blocked nasal passages during pregnancy.
Then there ate the crusty sentiments lifted straight from The Nation circa 1985, like Newman's horror that (gasp!) chain stores are squeezing out local merchants.
exploits of the peripatetic Theatre Lady and stablemate Crusty Lily would have taxed even Alan Whicker.
Pick a bread, any bread: Frozen vegan pizza dough, dry vegan pizza dough mix, ready-to-use (already baked) vegan pizza dough, pita bread, English muffins or scones, French baguettes (crusty French bread) or Italian bread, Kaiser (hard) rolls, burger buns, or Lebanese flat bread.