\Horse"shoe`\, n.
1. A shoe for horses, consisting of a narrow plate of iron in
   form somewhat like the letter U, nailed to a horse's hoof.
2. Anything shaped like a horsehoe crab.
3. (Zo["o]l.) The Limulus of horsehoe crab.
{Horsehoe head} (Med.), an old name for the condition of the
   skull in children, in which the sutures are too open, the
   coronal suture presenting the form of a horsehoe.
   --Dunglison.
{Horsehoe magnet}, an artificial magnet in the form of a
   horsehoe.
{Horsehoe nail}. See {Horsenail}.
{Horsehoe nose} (Zo["o]l.), a bat of the genus {Rhinolophus},
   having a nasal fold of skin shaped like a horsehoe.