shadowiness

from WordNet (r) 3.0 (2006)

shadowiness
    n 1: relative darkness caused by light rays being intercepted by
         an opaque body; "it is much cooler in the shade"; "there's
         too much shadiness to take good photographs" [syn: {shade},
         {shadiness}, {shadowiness}]

from The Collaborative International Dictionary of English v.0.48

Shadowiness \Shad"ow*i*ness\, n.
   The quality or state of being shadowy.
   [1913 Webster]