Scotomy

Scot"o*my (?), n. [NL. scotomia, from Gr. ? dizziness, fr. ? to darken, fr. sko`tos darkness: cf. F. scotomie.] 1. Dizziness with dimness of sight. [Obs.] Massinger.

2. (Med.) Obscuration of the field of vision due to the appearance of a dark spot before the eye.