The Collaborative International Dictionary
Holophotal
Holophotal \Hol`o*pho"tal\, a. [Holo + Gr. ?, ?, light.] (Opt.) Causing no loss of light; -- applied to reflectors which throw back the rays of light without perceptible loss.
Wiktionary
holophotal
a. Causing no loss of light; applied to reflectors which throw back the rays of light without perceptible loss.