Etymology
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Stern gang (n.)
militant Zionist terrorist organization (officially Lohame Herut Yisra'el "Fighters for the Freedom of Israel") founded 1940 by Avram Stern (1907-1942).
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jeunesse doree (n.)
1811, French jeunesse dorée "gilded youth, rich and fashionable young men," from jeunesse "youth," from jeune "young" (12c.), from Latin iuvenis "young man" (see young (adj.)) + fem. of doré "gilded."
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middle age (n.)

"period between youth and old age," formerly generally understood as 40 to 50, late 14c., from middle (adj.) + age (n.). The adjective middle-aged "having lived to the middle of the ordinary human lifespan, neither old nor young" is by c. 1600.

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fin de siecle (adj.)

1890, from French fin de siècle "end of century," phrase used as an adjective. At the time it meant "modern;" now it means "from the 1890s." "App. first in title of a comedy, Paris fin de siècle, produced at the Gymnase, Feb. 1890" [Weekley]. French siècle "century, age" is from Latin saeculum "age, span of time, generation" (see secular).

No proof is needed of the extreme silliness of the term. Only the brain of a child or of a savage could form the clumsy idea that the century is a kind of living being, born like a beast or a man, passing through all the stages of existence, gradually ageing and declining after blooming childhood, joyous youth, and vigorous maturity, to die with the expiration of the hundredth year, after being afflicted in its last decade with all the infirmities of mournful senility. [Max Nordau, "Degeneration," English translation, 1895]
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