photometer
[ foh-tom-i-ter ]
/ foʊˈtɒm ɪ tər /
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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.
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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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 sourceSee also spectrophotometer
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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