The Collaborative International Dictionary of English v.0.48:

Umbratic \Um*brat"ic\ ([u^]m*br[a^]t"[i^]k), Umbratical
\Um*brat"ic*al\ ([u^]m*br[a^]t"[i^]*kal), a. [L. umbraticus,
   from umbra shade. See Umbrage.]
   Of or pertaining to the shade or darkness; shadowy; unreal;
   secluded; retired. [R.] --B. Jonson.
   [1913 Webster]