Catoptric \Ca*top"tric\, Catoptrical \Ca*top"tric*al\, a. [Gr. ?. See Catopter.]

Of or pertaining to catoptrics; produced by reflection.

Catoptric light, a light in which the rays are concentrated by reflectors into a beam visible at a distance.

Source: Webster's Revised Unabridged Dictionary (1913)