Wiktionary
absorption factor
alt. The measurement of a specific substance's ability to absorp radiant energy; absorptivity.(R:MW3 1976: page=6) n. The measurement of a specific substance's ability to absorp radiant energy; absorptivity.(R:MW3 1976: page=6)
WordNet
absorption factor
n. (physics) the property of a body that determines the fraction of the incident radiation or sound flux absorbed or absorbable by the body [syn: absorptivity]