gorget

n. armor that protects the throat area; ornamental collar; patch of color on a bird's neck

A gorget originally was a steel collar designed to protect the throat. It was a feature of older types of armor and intended to protect against swords and other non-projectile weapons. Later, particularly from the 18th century onwards, the gorget became primarily ornamental, serving only as a symbolic accessory on military uniforms.
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Noun
1. armor plate that protects the neck
(hypernym) armor plate, armour plate, armor plating, plate armor, plate armour
(part-holonym) body armor, body armour, suit of armor, suit of armour, coat of mail, cataphract

n. gorget, armor that protects the throat area; ornamental collar; patch of color on a bird's neck

(n.)
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.
  

(n.)
A ruff worn by women.
  

(n.)
A piece of plate armor covering the same parts and worn over the buff coat in the 17th century, and without other steel armor.
  

(n.)
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.
  

(n.)
A grooved instrunent used in performing various operations; -- called also blunt gorget.
  

(n.)
A cutting instrument used in lithotomy.
  

(n.)
A crescent-shaped, colored patch on the neck of a bird or mammal.