The Collaborative International Dictionary of English v.0.48:
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]