Source : Webster's Revised Unabridged Dictionary (1913)

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.