Wordnet 3.0
NOUN (1)
1.
a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance;
the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber;
- Example: "absorptance equals 1 minus transmittance"[syn: absorption coefficient, coefficient of absorption, absorptance]
WordNet (r) 3.0 (2006):
absorption coefficient
n 1: a measure of the rate of decrease in the intensity of
electromagnetic radiation (as light) as it passes through a
given substance; the fraction of incident radiant energy
absorbed per unit mass or thickness of an absorber;
"absorptance equals 1 minus transmittance" [syn:
absorption coefficient, coefficient of absorption,
absorptance]