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Meaning of transmissometer

trans•mis•som•e•ter

Pronunciation: (trans"mu-som'i-tur, tranz"-), [key]
— n. Meteorol.
  1. 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.