The Collaborative International Dictionary
Luna \Lu"na\, n. [L.; akin to lucere to shine. See Light, n., and cf. Lune.]
The moon.
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(Alchemy) Silver.
Luna cornea (Old Chem.), horn silver, or fused silver chloride, a tough, brown, translucent mass; -- so called from its resemblance to horn.
Luna moth (Zo["o]l.), 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.
Wiktionary
n. (context entomology English) A large, green American moth, ''Actias luna'', that has crescent-shaped marks on its wings
WordNet
n. large pale-green American moth with long-tailed hind wings and a yellow crescent-shaped mark on each fore wing [syn: Actias luna]