Definition of absorptance in English:

absorptance

noun

Physics
  • A measure of the degree to which a substance or object absorbs radiation incident on it, equal to the ratio of the absorbed to the incident flux.

Origin

1920s. From classical Latin absorpt-, past participial stem of absorbēre absorb + -ance, probably after reflectance.

Pronunciation:

absorptance

/abˈsɔːpt(ə)ns//abˈzɔːpt(ə)ns/