Luna

[loo-nuh] /ˈlu nə/
noun
1.
the ancient Roman goddess personifying the moon, sometimes identified with Diana.
2.
(in alchemy) silver.
3.
(lowercase). Also, lunette. Ecclesiastical. the crescent-shaped receptacle within the monstrance, for holding the consecrated Host in an upright position.
Origin
< Latin lūna the moon
British Dictionary definitions for Luna

Luna1

/ˈluːnə/
noun
1.
the alchemical name for silver
2.
the Roman goddess of the moon Greek counterpart Selene
Word Origin
from Latin: moon

Luna2

/ˈluːnə/
noun
1.
any of a series of Soviet lunar space-probes, one of which, Luna 9, made the first soft landing on the moon (1966)
Word Origin and History for Luna
n.

late 14c. "moon," also an alchemical name for "silver;" from Latin luna "moon, goddess of the moon," from *leuksna- (cf. Old Church Slavonic luna "moon," Old Prussian lauxnos "stars," Middle Irish luan "light, moon"), from the same source as lux, lumen "light," lucere "to shine" (see light (n.)). The luna moth (1841, American English) so called for the crescent-shaped markings on its wings. Lunarian (1708) was an early word for "inhabitant of the moon."