Horseman
Horseman , noun
1.
A rider on horseback; one skilled in the management of horses; a mounted man.
2.
(Military) A mounted soldier; a cavalryman.
3.
(a) (Zoology) A land crab of the genus Ocypoda, living on the coast of Brazil and the West Indies, noted for running very swiftly.
(b)
(Zoology) A West Indian fish of the genus Eques, as the light-horseman (Eques lanceolatus).