The Collaborative International Dictionary
Photovisual
Photovisual \Pho`to*vis"u*al\, a. (Optics) Of certain achromatic lenses, having the same focus for the actinic and for the brightest of the visual rays.
Wiktionary
photovisual
a. 1 (context astronomy English) Relating to the magnitude of a star as measured by the size of its image on an isochromatic photographic emulsion. 2 (cx optics English) Of certain achromatic lenses, having the same focus for the actinic and for the brightest of the visual rays.