- Nautical. a sliding ring or collar of rope, wood, or metal that confines a yard or the jaws of a gaff to the mast but allows vertical movement.
- nautical a ring that holds the jaws of a boom to the mast but lets it slide up and down
n.late 15c., “binding that fixes a yard to a mast,” from parel “equipment” (c.1400), earlier “apparel” (early 14c.), a shortening of apparel (n.).