Defn: The horse tick or forest fly (Hippobosca).
HORSEFOOT
Horse"foot`, n.; pl. Horsefeet.
1. (Bot.)
Defn: The coltsfoot.
2. (Zoöl.)
Defn: The Limulus or horseshoe crab.
HORSE GUARDS
Horse" Guards`. (Mil.)
Defn: A body of cavalry so called; esp., a British regiment, called the Royal Horse Guards, which furnishes guards of state for the sovereign. The Horse Guards, a name given to the former headquarters of the commander in chief of the British army, at Whitehall in London.
HORSEHAIR
Horse"hair`, n.
Defn: A hair of a horse, especially one from the mane or tail; the hairs of the mane or tail taken collectively; a fabric or tuft made of such hairs. Horsehair worm (Zoöl.), the hair worm or gordius.