/ Dictionary / Index P photometry: Meaning and Definition of Find definitions for: pho•tom•e•try Pronunciation: (fō-tom'i-trē), [key] — n. the measurement of the intensity of light or of relative illuminating power. the science dealing with such measurements. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: photometry (Thesaurus) photometer photomicrograph Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language