- (Armor) Protective armor for a horse's buttocks.
- 1786: The Croupiere or Buttock Piece was also some times formed of plates of copper, brass or iron, though often of jacked leather, when the chanfron and poitrinal were of metal. — Francis Grose, A Treatise on Ancient Armour and Weapons, page 30.
- Is this word also French?
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