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The Collaborative International Dictionary of English v.0.48 (gcide)

Luna \Lu"na\, n. [L.; akin to lucere to shine. See {Light}, n.,
and cf. {Lune}.]
1. The moon.
[1913 Webster]

2. (Alchemy) Silver.
[1913 Webster]

{Luna cornea} (Old Chem.), horn silver, or fused silver
chloride, a tough, brown, translucent mass; -- so called
from its resemblance to horn.

{Luna moth} (Zool.), a very large and beautiful American moth
({Actias luna}). Its wings are delicate light green, with
a stripe of purple along the front edge of the anterior
wings, the other margins being edged with pale yellow.
Each wing has a lunate spot surrounded by rings of light
yellow, blue, and black. The caterpillar commonly feeds on
the hickory, sassafras, and maple.
[1913 Webster]