a piece of armor, whether of chain mail or of plate, defending the throat and upper part of the breast, and forming a part of the double breastplate of the 14th century.-a piece of plate armor covering the same parts and worn over the buff coat in the 17th century, and without other steel armor.-a small ornamental plate, usually crescent-shaped, and of gilded copper, formerly hung around the neck of officers in full uniform in some modern armies.-a ruff worn by women.-a cutting instrument used in lithotomy.-a grooved instrunent used in performing various operations; -- called also blunt gorget.-a crescent-shaped, colored patch on the neck of a bird or mammal.