Definitions for absorptivity
Princeton's WordNet
absorptivity, absorption factor(noun)
(physics) the property of a body that determines the fraction of the incident radiation or sound flux absorbed or absorbable by the body
Wiktionary
absorptivity(Noun)
The quality of being absorptive; absorptiveness.
absorptivity(Noun)
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.
absorptivity(Noun)
The fraction of radiation absorbed by a surface to the total radiation incident on the surface.
Webster Dictionary
Absorptivity(noun)
absorptiveness
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"absorptivity." Definitions.net. STANDS4 LLC, 2013. Web. 19 May 2013. <http://www.definitions.net/definition/absorptivity>.