absorptivity

[ ab-sawrp-tiv-i-tee, -zawrp- ]

noun

, Physics.

1. the property of a body that determines the fraction of incident radiation absorbed or absorbable by the body.

absorptivity

/ ˌæbsɔːpˈtɪvɪtɪ; -zɔːp- /

noun

1. physics a measure of the ability of a material to absorb radiation, equal to the internal absorptance of a homogeneous layer of the material under conditions in which the path of the radiation has unit length and the boundaries of the layer have no influence

Word History and Origins

Origin of absorptivity¹

First recorded in 1860–65; absorptive + -ity