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Meaning of transmissivity

trans•mis•siv•i•ty

Pronunciation: (trans"mi-siv'i-tē, tranz"-), [key]
— n. Physics.
  1. a measure of the ability of a material or medium to transmit electromagnetic energy, as light. Cf. transmittance.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.