[ foh-tom-i-ter ]
See synonyms for photometer on
  1. 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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use photometer in a sentence

British Dictionary definitions for photometer


/ (fəʊˈtɒmɪtə) /

  1. 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