(1):
(n.) A mounted soldier; a cavalryman.
(2):
(n.) A West Indian fish of the genus Eques, as the light-horseman (E. lanceolatus).
(3):
(n.) A rider on horseback; one skilled in the management of horses; a mounted man.
(4):
(n.) A land crab of the genus Ocypoda, living on the coast of Brazil and the West Indies, noted for running very swiftly.