obumbratio

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

ŏbumbrātĭo, ōnis, f. [obumbro],

a shading , darkening; trop., an obscuring (postclass.): allegoricae caecitatis obumbratio, Arn 5, 186: vicissitudinis, Vulg. Jacob. 1, 17.