— semiaridity /sem'ee euh rid"i tee, sem'uy-/ , n.
/sem'ee ar"id, sem'uy-/ , adj. (of a region, land, etc.)
characterized by very little annual rainfall, usually from 10 to 20 in. (25 to 50 cm): the struggle to raise vegetables in semiarid regions.
[ 1895-1900, Amer.; SEMI- + ARID ]