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photometry

[foh-tom-i-tree]
noun
  1. the measurement of the intensity of light or of relative illuminating power.
  2. the science dealing with such measurements.
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Origin of photometry

From the New Latin word photometria, dating back to 1815–25. See photo-, -metry
Related formspho·to·met·ric [foh-tuh-me-trik] /ˌfoʊ təˈmɛ trɪk/, pho·to·met·ri·cal, adjectivepho·tom·e·trist, pho·to·me·tri·cian [foh-tuh-me-trish-uh n] /ˌfoʊ tə mɛˈtrɪʃ ən/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for photometry

photometry

noun
  1. the measurement of the intensity of light
  2. the branch of physics concerned with such measurements
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Derived Formsphotometric (ˌfəʊtəˈmɛtrɪk), adjectivephotometrically, adverbphotometrist, noun
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

photometry in Science

photometry

[fō-tŏmĭ-trē]
  1. The measurement of the intensity, brightness, or other properties of light. Also called photometrics See also luminous intensity.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.