photometer

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/fəʊˈtɒmɪtə/US:USA pronunciation: IPA and respellingUSA pronunciation: IPA/foʊˈtɑmɪtɚ/ ,USA pronunciation: respelling(fō tom′i tər)


WordReference Random House Learner's Dictionary of American English © 2026
pho•tom•e•ter /foʊˈtɑmɪtɚ/USA pronunciation   n. [countable]
  1. Opticsan instrument that measures light.
See -meter-.
WordReference Random House Unabridged Dictionary of American English © 2026
pho•tom•e•ter  (fō tom′i tər),USA pronunciation n. [Optics.]
  1. Opticsan 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.
  • Neo-Latin photometrum. See photo-, -meter
  • 1770–80

Collins Concise English Dictionary © HarperCollins Publishers::
photometer /fəʊˈtɒmɪtə/ n
  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
'photometer' also found in these entries (note: many are not synonyms or translations):
Pickering - cytophotometer - microphotometer - pyrophotometer - telephotometer - spectrophotometer

Forum discussions with the word(s) "photometer" in the title:


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