n. 地球反照

Earthlight \Earth"light`\, n. (Astron.)
The sunlight reflected from the earth to the moon, by which
we see faintly, when the moon is near the sun (either before
or after new moon), that part of the moon's disk unillumined
by direct sunlight, or ``the old moon in the arms of the
new.''
[Webster 1913 Suppl.]