English noun: absorptance | |||
| 1. | absorptance (quantity) 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 | ||
| Samples | Absorptance equals 1 minus transmittance. | ||
| Synonyms | absorption coefficient, coefficient of absorption | ||
| Broader (hypernym) | coefficient | ||