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ferronnière

ferronière, ferronnière
  (fɛrɔnjɛr)
  [Fr. ferronnière, a frontlet; a coronet worn on the forehead: after Leonardo da Vinci's portrait La Belle Ferronnière.]
  (See quot. 1960.)

1840 Thackeray in Fraser's Mag. June 681/2 The sisters..with pink scarfs..and brass ferronières..were voted very charming. 1908 H. C. Smith Jewellery xx. 172 This head ornament is known as the ferronière. 1960 H. Hayward Antique Coll. 117/1 Ferronière, a chain worn as an ornament encircling the head with a jewel in the centre.

Oxford English Dictionary

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