/ Dictionary / Index T telephotometer: Meaning and Definition of Find definitions for: tel•e•pho•tom•e•ter Pronunciation: (tel"u-fō-tom'i-tur), [key] — n. an instrument for measuring the amount of light emanating from a distant object. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. telephoto lens teleplasm Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language