transmission density

World English Dictionary
transmission density
 
n
physics τ, Former name: optical density a measure of the extent to which a substance transmits light or other electromagnetic radiation, equal to the logarithm to base ten of the reciprocal of the transmittance

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WordNet
transmission density

noun
(physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation [syn: optical density
WordNet® 3.0, © 2006 by Princeton University.
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