/ Dictionary / Index T transmittance: Meaning and Definition of Find definitions for: trans•mit•tance Pronunciation: (trans-mit'ns, tranz-), [key] — n. the ratio of the radiant flux transmitted through and emerging from a body to the total flux incident on it: equivalent to one minus the absorptance. Also called transmission. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: transmittance (Thesaurus) transmittal transmitter Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language