raininess

from WordNet (r) 3.0 (2006)

raininess
    n 1: (of weather) the badness of the weather; "they were wearied
         with the foulness of the weather" [syn: {foulness},
         {raininess}]

from The Collaborative International Dictionary of English v.0.48

Raininess \Rain"i*ness\ (r[=a]n"[i^]*n[e^]s), n.
   The state of being rainy.
   [1913 Webster]

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