absorptance
1. [ noun ] (physics,mathematics) a measure of the decrease in the intensity of electromagnetic radiation (as light) as it passes through a substance; the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber
Synonyms: coefficient_of_absorption absorption_coefficient
Examples:

: "absorptance equals 1 minus transmittance"

Related terms: coefficient
Similar spelling:   absorptive
  absorption
  absorbency
  absorbate
  absorbable
  absorptivity
  absorber
  absorbent