3. (Zoˆl.) (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).
Horse"man*ship, n. The act or art of riding, and of training and
managing horses; manege.
Horse"mint` (?), n. (Bot.) (a) A coarse American plant of the Mint
family (Monarda punctata). (b) In England, the wild mint (Mentha
sylvestris).
Horse"nail` (?), n. A thin, pointed nail, with a heavy flaring head,
for securing a horsehoe to the hoof; a horsehoe nail.
Horse"play` (?), n. Rude, boisterous play.
Too much given to horseplay in his raillery.
Dryden.
Horse"pond` (?), n. A pond for watering horses.
Horse" pow`er (?). 1. The power which a horse exerts.
2. (Mach.) A unit of power, used in stating the power required to drive
machinery, and in estimating the capabilities of animals or steam
engines and other prime movers for doing work. It is the power required
for the performance of work at the rate of 33,000 English units of work
per minute; hence, it is the power that must be exerted in lifting
33,000 pounds at the rate of one foot per minute, or 550 pounds at the
rate of one foot per second, or 55 pounds at the rate of ten feet per
second, etc.
The power of a draught horse, of average strength, working eight hours
per day, is about four fifths of a standard horse power.
Brake horse power, the net effective power of a prime mover, as a steam
engine, water wheel, etc., in horse powers, as shown by a friction
brake. See Friction brake, under Friction. -- Indicated horse power,
the power exerted in the cylinder of an engine, stated in horse powers,
estimated from the diameter and speed of the piston, and the mean
effective pressure upon it as shown by an indicator. See Indicator. --
Nominal horse power (Steam Engine), a term still sometimes used in
England to express certain proportions of cylinder, but having no value
as a standard of measurement.
3. A machine worked by a horse, for driving other machinery; a horse
motor.
Horse"-rad`ish (?), n. (Bot.) A plant of the genus Nasturtium (N.
Armoracia), allied to scurvy grass, having a root of a pungent taste,
much used, when grated, as a condiment and in medicine. Gray.
Horse-radish tree. (Bot.) See Moringa.
Horse"rake` (?), n. A rake drawn by a horse.
Horse"shoe` (?), n. 1. A shoe for horses, consisting of a narrow plate
of iron in form somewhat like the letter U, nailed to a horse's hoof.