semi-arid

semiarid

[sem-ee-ar-id, sem-ahy-]
adjective (of a region, land, etc.)
characterized by very little annual rainfall, usually from 10 to 20 inches (25 to 50 cm): the struggle to raise vegetables in semiarid regions.

Origin:
1895–1900, Americanism; semi- + arid

semiaridity [sem-ee-uh-rid-i-tee, sem-ahy-] , noun
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World English Dictionary
semiarid (ˌsɛmɪˈærɪd)
 
adj
characterized by scanty rainfall and scrubby vegetation, often occurring in continental interiors: the semiarid regions of Australia
 
semia'ridity
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
semiarid   (sěm'ē-ār'ĭd)  Pronunciation Key 
Having low precipitation but able to support grassland and scrubby vegetation. Steppes have semiarid climates.
The American Heritage® Science Dictionary
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