A a


    • US Pronunciation
    • US IPA
    • [ab-sawrp-tuh ns, -zawrp-]
    • /æbˈsɔrp təns, -ˈzɔrp-/
    • US Pronunciation
    • US IPA
    • [ab-sawrp-tuh ns, -zawrp-]
    • /æbˈsɔrp təns, -ˈzɔrp-/

Definitions of absorptance word

  • noun absorptance a measure of the ability of an object to absorb radiation, equal to the ratio of the absorbed radiant flux to the incident flux. For a layer of material the ratio of the flux absorbed between the entry and exit surfaces of the layer to the flux leaving the entry surface is the internal absorptance 3
  • noun absorptance the ratio of the amount of radiation absorbed by a surface to the amount of radiation incident upon it. 1
  • noun absorptance (optics, physics) Absorbed radiation and incident radiation in a ratio format; a measurement that shows how well a surface absorbs radiation. (First attested in the mid 20th century.). 1

Information block about the term

Origin of absorptance

First appearance:

before 1930
One of the 10% newest English words
1930-35; translation of German Absorptionsvermögen. See absorption, -ance

Historical Comparancy

Parts of speech for Absorptance


absorptance popularity

A pretty common term. Usually people know it’s meaning, but prefer to use a more spread out synonym. About 54% of English native speakers know the meaning and use word.
According to our data most of word are more popular. This word is almost not used. It has a much more popular synonym.

absorptance usage trend in Literature

This diagram is provided by Google Ngram Viewer

Synonyms for absorptance

noun absorptance

  • absorption coefficient — a measure of the rate of decrease in the intensity of electromagnetic radiation, as light, as it passes through a given substance.

See also

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