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Webster 1913 Edition
Aridity
A-rid′i-ty
,Noun.
pl. 
Aridities
. [L. 
ariditas
, fr. aridus
.] 1. 
The state or quality of being arid or without moisture; dryness. 
2. 
Fig.: Want of interest of feeling; insensibility; dryness of style or feeling; spiritual drought. 
Norris.