Definition of "absorptance" []

• The ratio of absorbed to incident radiation. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Certainly, over the tropical midday deep oceans, the ocean absorptance must be in teh range of 97-98%, since the near normal incident radiation simply goes on down till something absorbs it."
• "So the 70 % of the earth surface that is ocean must have a fairly good grey body absorption spectrum with an absorptance of over 95%."
• "Two things to keep clear when thinking about emissivity, it is commonly under stood that emissivity = absorptance."