Debutante

google

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early 19th century: from French débutante (feminine) ‘leading off’, from the verb débuter .

wiktionary

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From French débutante.

etymonline

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debutante (n.)

1801, "female stage actress making her first public performance," from fem. of French debutant, noun use of present participle of débuter "to make the first strike" (in billiards, etc.), from debut (see debut). In reference to a young woman making her first appearance in society, from 1817.