pasterns

/P AE1 S T ER0 N Z/
noun
  1. 1

    The part of a horse's leg between the fetlock joint and the hoof.

  2. 2

    A shackle for horses while pasturing.

  3. 3

    A patten.

Source: https://en.wiktionary.org/wiki/pastern, https://en.wiktionary.org/wiki/pasterns