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Noun: aridity  u'ri-di-tee
  1. The quality of yielding nothing of value
    - fruitlessness, barrenness
     
  2. A deficiency of moisture (especially when resulting from a permanent absence of rainfall)
    - aridness, thirstiness

Derived forms: aridities

Type of: dryness, quality, waterlessness, xerotes

Encyclopedia: Aridity