Etymology
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bluebell (n.)
also blue-bell, popular name of various plants with flowers blue and more or less bell-shaped, 1570s, from blue (adj.1) + bell (n.).
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lunar (adj.)
early 15c., "crescent-shaped;" 1620s, "pertaining to the moon," from Old French lunaire (15c.), from Latin lunaris "of the moon," from luna "moon" (see luna).
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moonbeam (n.)

"ray of light from the moon," 1580s, from moon (n.) + beam (n.).

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cyan (n.)

"greenish-blue color," 1889, short for cyan blue (1879), from Greek kyanos "dark blue, dark blue enamel, lapis lazuli," probably a non-Indo-European word, but perhaps akin to, or from, Hittite *kuwanna(n)- "copper blue."

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lunate (adj.)
"crescent-shaped," 1777, from Latin lunatus "half-moon shaped," from luna "moon" (see luna).
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cyanosis (n.)

"blue disease," the "blue jaundice" of the ancients, 1820, Medical Latin, from Greek kyanosis, from kyanos "dark blue color" (see cyan) + -osis. Also cyanopathy. It is caused by imperfect circulation and oxygenation of the blood.

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moonscape (n.)

"the landscape of the moon or a surface resembling it," 1926, from moon (n.) + scape (n.1).

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luna (n.)
late 14c. "the moon," especially as personified in a Roman goddess answering to Greek Selene; also an alchemical name for "silver;" from Latin luna "moon, goddess of the moon," from PIE *leuksna- (source also of Old Church Slavonic luna "moon," Old Prussian lauxnos "stars," Middle Irish luan "light, moon"), suffixed form of root *leuk- "light, brightness." The luna moth (1841, American English) so called for the crescent-shaped eye-spots on its wings.
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Lunarian (n.)
1708, "moon-man, inhabitant of the moon;" see lunar + -ian. Also "expert on or student of lunar phenomena" (1817).
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moonlit (adj.)

also moon-lit, "lighted or illuminated by the moon," 1819, from moon (n.) + lit (adj.).

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