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