noun
: the fractional rate in the transmission of radiation through a scattering medium (as of light through fog) at which the flux density of radiation decreases by scattering in respect to the thickness of the medium traversed
noun
: the fractional rate in the transmission of radiation through a scattering medium (as of light through fog) at which the flux density of radiation decreases by scattering in respect to the thickness of the medium traversed
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012