sunlight reflected from the Earth, especially that reflected to the Moon and back again. For a few days before and after New Moon, this doubly ... Found on http://www.britannica.com/eb/a-z/e/3
Light reflected from the Earth and its atmosphere onto the dark part of the Moon when it is not full. Earthshine explains why the full disk of the Moon remains dimly visible even when only part of it is illuminated by sunlight. Found on http://www.daviddarling.info/encyclopedia/E/earthshine.html
The faint luminosity seen of the night side of the Moon, especially when the Moon appears at a crescent phase. It is caused by light reflected from the Earth onto the Moon.
Found on http://www.encyclo.co.uk/local/20448
Sunlight reflected by Earth that makes the otherwise dark part of the Moon glow faintly. Its especially obvious during the Moons thin crescent phases. Found on http://www.skyandtelescope.com/astronomy-terms/