English

Noun

absorptivity ‎(plural absorptivities)

1. The quality of being absorptive; absorptiveness. [First attested in the mid 19^th century.]^[1]
2. (thermodynamics) The fraction of radiation absorbed by a surface to the total radiation incident on the surface. [First attested in the mid 19^th century.]^[1]
3. (analytical chemistry) The constant a in the Beer's law relation A = abc, where A is the absorbance, b the path length, and c the concentration of solution. Also known as absorptive power. Formerly known as absorbency index; absorption constant; extinction coefficient.

Synonyms

• absorption coefficient
• absorption factor

Translations

References

1. 1 2 Lesley Brown (editor), The Shorter Oxford English Dictionary, 5th edition (Oxford University Press, 2003 [1933], ISBN 978-0-19-860575-7), page 9