shoulder knot

  1. a knot of ribbon or lace formerly worn as an ornament on the shoulder
  2. a detachable ornament of braided cord worn on the shoulders of full-dress uniforms

See shoulder knot in American Heritage Dictionary 4

noun
  1. Either of two detachable braided cords worn on each shoulder of the full-dress uniform of a commissioned officer.
  2. An ornamental knot of ribbon or lace formerly worn on the shoulder.
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