crust

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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 ?
Oven-barbecuing can glaze meat but can't give charcoal's smokiness and crustiness.
Rounding out the cast is the magnificent Morgan Freeman, who also earned an Academy Award for Best Supporting Actor as Scrap, the gym caretaker and counterpoint to Dunn's crustiness.
Hotter than an electric-powered industrial oven, this one imparts the perfect degree of crustiness on the outside, while maintaining that hole-y quality on the inside.
They're attempting to make the perfect pie by asking fans what they look for, from content to crustiness to size.
Ripping open the packaging of a freshly-made cheese and salad baguette, he points to the crustiness of the bread and the ordered position of the ingredients.
NClean away crustiness around the eyes with cotton wool and cooled boiled water.
Finally, the loaf is baked on a stone floor to give it a distinctive crustiness and texture.
When a High Court judge behaves with all the puffed-up power and crustiness of a cartoon judge, it is not really a laughing matter.
For so many years the epitome of reactionary crustiness, Newmarket has followed Ascot's lead and taken a huge leap forward under chairman Peter Player and a revivified Nick Lees.