Source : Webster's Revised Unabridged Dictionary (1913)

Subnuvolar \Sub*nu"vo*lar\, a. [Pref. sub + It. nuvola cloud:
   cf. L. subnubilus somewhat cloudy.]
   Under the clouds; attended or partly covered or obscured by
   clouds; somewhat cloudy. [R. & Poetic]

         Subnuvolar lights of evening sharply slant. --Milnes.