Desert

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Desert

Desert land where vegetation cover is exceedingly sparse correspond to the 'hyperarid' regions of aPlanet or Moon, where rainfall is exceedingly rare and infrequent.

Desert can occupy a Planet, Moon or a region or part of a Planet or Moon that, on an average annual basis, have a moisture deficit (i.e. they can potentially lose more moisture than is received). These areas are collectively called 'drylands' and extend over the land surface of many planets and moons. Because Desert is a vague term, the use of 'dryland', and its subdivisions of hyper arid, arid, semiarid and dry-subhumid, is preferred in some contexts, and is approved by the Planetary Almanic.