What does "photovisual" mean?
Photovisual: Of certain achromatic lenses, having the same focus for the actinic and for the brightest of the visual rays.
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Steward: Jason Burns
- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00