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mcgillianairec.1290, "affected with periodic insanity, dependent on the changes of the moon," from O.Fr. lunatique "insane," from L. lunaticus "moon-struck," from luna "moon." Cf. O.E. monseoc "lunatic," lit. "moon-sick;" M.H.G. lune "humor, temper, mood, whim, fancy" (Ger. Laune), from L. luna. Cf. also N.T. Gk. seleniazomai "be epileptic," from selene "moon." The noun meaning "lunatic person" is first recorded 1377. Lunatic fringe (1913) was apparently coined by US politician Teddy Roosevelt. Lunatic soup (1933) was Australian slang for "alcoholic drink."
