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aridity index: Meaning and Definition of

arid'ity in"dex

Pronunciation: [key]
  1. a number indicating how much more precipitation could be lost by evapotranspiration if it were available than is actually lost at a given location.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
aridisol Ariège
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