noun Etymology: New Latin photometrum, from phot- + -metrum -meter Date: 1778 an instrument for measuring luminous intensity, luminous flux, illumination, or brightness
PHOTOMETER
Meaning of PHOTOMETER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012