photometer

[ foh-tom-i-ter ]
/ foʊˈtɒm ɪ tər /
SEE SYNONYMS FOR photometer ON THESAURUS.COM

noun Optics.

an instrument that measures luminous intensity or brightness, luminous flux, light distribution, color, etc., usually by comparing the light emitted by two sources, one source having certain specified standard characteristics.

Origin of photometer

From the New Latin word photometrum, dating back to 1770–80. See photo-, -meter

Words nearby photometer

photom., photomacrograph, photomap, photomechanical, photomechanical transfer, photometer, photometric brightness, photometry, photomicrograph, photomicroscope, photomontage

Words related to photometer

actinometer, radiometer

Example sentences from the Web for photometer

British Dictionary definitions for photometer

photometer
/ (fəʊˈtɒmɪtə) /

noun

an instrument used in photometry, usually one that compares the illumination produced by a particular light source with that produced by a standard source See also spectrophotometer