Synonyms

photometer

American

[foh-tom-i-ter] / foʊˈtɒm ɪ tər /

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.

photometer British

/ 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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of photometer

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Next, we get to NISP, which stands for Euclid's Near-Infrared Spectrometer and Photometer.

From Scientific American • Aug. 3, 2023

"We've seen simulated images, we've seen laboratory test images," William Gillard, an instrument scientist for Euclid's Near-Infrared Spectrometer and Photometer, said in the same statement.

From Salon • Aug. 1, 2023

Photometer, fō-tom′e-tėr, n. an instrument for measuring the intensity of light, esp. for comparing the amount of light coming from different sources.—adjs.

From Chambers's Twentieth Century Dictionary (part 3 of 4: N-R) by Various

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023