What is under the clouds; attended or partly covered or obscured by clouds; somewhat cloudy. [R. & Poetic] Subnuvolar lights of evening sharply slant. Milnes called?

subnuvolar — Under the clouds; attended or partly covered or obscured by clouds; somewhat cloudy. [R. & Poetic] Subnuvolar lights of evening sharply slant. Milnes. (Webster's 1913.)