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Originally a brand name.


photronic (not comparable)

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    • 1937, Rolla Roy Ramsey, Experimental Radio (page 169)
      The photoelectric cell and the Weston photronic cells are the ones in most common use. The photronic cell is an oxide cell and produces a small electromotive force which is proportional to the light intensity.
    • 1946, United States. Navy Department. Office of Industrial Relations, U.S. Navy Manual of Safety Equipment (page 93)
      A photronic light meter consists of a photronic cell connected to an electrical meter graduated directly in foot-candles.

Usage notes[edit]


  • Merriam-Webster [1]