noun Astronomy.
the faint illumination of the part of the moon not illuminated by sunlight, as during a crescent phase, caused by the reflection of light from the earth.
Also called earthlight.

1825–35; earth + shine Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
earthshine or earthlight (ˈɜːθˌʃaɪn)
the ashen light reflected from the earth, which illuminates the new moon when it is not receiving light directly from the sun
earthlight or earthlight

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
But beyond, even with the earthshine, it became more and more difficult to make out any landmarks on the surface.
Only the faint glow of earthshine filled the shadowy recesses.
The moon was dagger-sharp with a full sphere on earthshine.
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