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[ab-sawrp-tiv-i-tee, -zawrp-] /ˈæb sɔrpˈtɪv ɪ ti, -zɔrp-/
noun, Physics.
the property of a body that determines the fraction of incident radiation absorbed or absorbable by the body.
Origin of absorptivity
1860-65; absorptive + -ity Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for absorptivity
  • It is not widely known, that the radiation spectrum applies per the absorptivity at each wavelength.
  • At low absorptivity, the degree of saturation appeared low enough to prevent damage from freezing and thawing.
  • Emissivity, absorptivity and reflectivity have nothing to do with convective or conductive heat transfer.
British Dictionary definitions for absorptivity


/ˌæbsɔːpˈtɪvɪtɪ; -zɔːp-/
(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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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