Meaning of Medici collar in English:

Medici collar

noun

(also de Medici collar)
  • A large, fan-shaped collar, usually of lace, wired to stand upright at the back and sloping to meet a square neckline at the front; = "Medicis".

    The style was made fashionable in the 17th century by the Medici women, especially Marie de Médicis, Queen of France, and was revived in a less extravagant form in the 19th century.

Origin

Late 19th century; earliest use found in The Living Age.