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Noun: reef knot  reef nót
Usage: Brit, Cdn (US: square knot)
  1. A double knot made of two half hitches and used to join the ends of two cords
    - square knot [N. Amer]
  2. A square knot used in a reef line
    - flat knot, square knot [N. Amer]

Derived forms: reef knots

Type of: knot

Encyclopedia: Reef knot