noun, plural albedos.
Astronomy. the ratio of the light reflected by a planet or satellite to that received by it.
Meteorology. such a ratio for any part of the earth's surface or atmosphere.
the white, inner rind of a citrus fruit.

1855–60; < Late Latin albēdō whiteness, equivalent to alb(us) white + -ēdō noun suffix; cf. torpedo Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
albedo (ælˈbiːdəʊ)
1.  the ratio of the intensity of light reflected from an object, such as a planet, to that of the light it receives from the sun
2.  physics the probability that a neutron passing through a surface will return through that surface
[C19: from Church Latin: whiteness, from Latin albus white]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

"ratio of light reflected from a surface," 1859, from L., lit. "whiteness," from albus "white" (see alb).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
albedo   (āl-bē'dō)  Pronunciation Key 
The fraction of the total light striking a surface that gets reflected from that surface. An object that has a high albedo (near 1) is very bright; an object that has a low albedo (near 0) is dark. The Earth's albedo is about 0.37. The Moon's is about 0.12.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The type of clouds formed by coal pollution, and the albedo of these clouds are
  another variable to the greenhouse gas equation.
Albedo is a measure of how much light an object reflects.
There is significant climate engineering which can be done by adjusting the
  human controlled part of albedo.
The power of heat input during the day depends on local albedo and the sine of
  the angle of the incident solar irradiance.
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