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