/ Dictionary / Index R reflectometer: Meaning and Definition of Find definitions for: re•flec•tom•e•ter Pronunciation: (rē"flek-tom'i-tur, ri-), [key] — n. Optics. a device for measuring reflectance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: reflectometer (Thesaurus) reflective reflector Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language