absorptance

Absorptance (a) is ratio of the radiant or luminous flux in a given spectral interval absorbed in a medium to that of the incident radiation. Also called absorption factor.
Found on http://www.ktf-split.hr/periodni/en/abc/a.html

Absorptance

The ratio of the radiation absorbed by a surface to the total energy falling on that surface described as a percentage.
Found on http://www.neo.ne.gov/statshtml/glossarya.htm

Absorptance

The ratio of solar energy absorbed by a surface to the solar energy striking it.
Found on http://solarexpert.com/Glossary.html

absorptance

ratio of the absorbed radiant or luminous flux to the incident flux under specified conditions unit: 1
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=845-04-75

absorptance

The ratio of the luminous or radiant flux absorbed by a body to the flux falling on it. Absorptance is generally represented by the Greek letter a (alpha). By definition, in the case of a blackbody a = 1. Absorptance was formerly known as absorptivity.
Found on http://www.daviddarling.info/encyclopedia/A/absorptance.html

Absorptance

The dissipation of light (radiation) within a surface or medium, caused by the conversion of radiant (luminous) energy to a different form of energy, usually heat, by interaction with matter. The absorption is the "missing piece", when comparing the total reflected and transmitted energy with the incident energy. The ratio of the total absorbed rad...
Found on http://www.intl-lighttech.com/support/glossary
No exact match found