/ Dictionary / Index T transmissometer: Meaning and Definition of Find definitions for: trans•mis•som•e•ter Pronunciation: (trans"mu-som'i-tur, tranz"-), [key] — n. Meteorol. an instrument for measuring visibility or the transmission of light in the atmosphere. Also called hazemeter, transmit&prim;tance me&sec;ter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. transmissivity transmit 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