'Catoptric light' definitions:

Definition of 'Catoptric light'

From: GCIDE

Catoptric \Ca*top"tric\, Catoptrical \Ca*top"tric*al\, a. [Gr. ?. See Catopter.] Of or pertaining to catoptrics; produced by reflection. [1913 Webster]
Catoptric light, a light in which the rays are concentrated by reflectors into a beam visible at a distance. [1913 Webster]