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A sudden vertigo in a horse, succeeded sometimes by unconsciousness, produced by an excess of blood in the brain; a mild form of apoplexy. Youatt.

ea. It includes the trilobites, Eurypteroidea, and Limuloidea. All are extinct except the horseshoe crabs of the last group. See Limulus.

Any revolving contrivance for affording amusement; esp., a ring of flying hobbyhorses.

An extinct mammal of the Horse family, but not larger than a sheep, and having three toes on each foot.

t is made of. South. Gentlemen of brave mettle. Shak. The winged courser, like a generous horse, Shows most true mettle when you check his course. Pope. To put one one's mettle, to cause or incite one to use one's best efforts.

Full of spirit; possessing constitutional ardor; fiery; as, a mettlesome horse. -- Met"tle*some*ly, adv. -- Met"tle*some*ness, n.

A stable or range of stables for horses; -- compound used in the plural, and so called from the royal stables in London, built on the site of the king's mews for hawks.

An extinct Miocene mammal of the Horse family, closely related to the genus Anhithecrium, and having three usable hoofs on each foot.

To cause or permit to stick fast in mire; to plunge or fix in mud; as, to mire a horse or wagon.

agricultural implement used in Flanders, consisting of a kind of large shovel drawn by a horse and guided by a man. [Written also mollebært and mouldebært.] Simmonds.

An ancient kind of cap worn by horsemen or huntsmen. Bacon.

A stone used in mounting a horse; a horse block.

That on which anything is mounted; a setting; hence, a saddle horse. [Obs.] Spenser.

A eye affected by the moon; also, a disease in the eye of a horse.

An American marine fish (Vomer setipennis); -- called also bluntnosed shiner, horsefish, and sunfish.

by the Moors in the later Middle Ages, esp. in Spain, in which the arch had the form of a horseshoe, and the ornamentation admitted no representation of animal life. It has many points of resemblance to the Arabian and Persian styles, but should be distinguished from them. See Illust. under Moresque.…

), native of the Northern United States and Canada. The adult male is about as large as a horse, and has very large, palmate antlers. It closely resembles the European elk, and by many zoölogists is considered the same species. See Elk. Moose bird (Zoöl.), the Canada jayor whisky jack. See Whisky jack. -- Moose deer.…

One of a celebrated breed of American trotting horses; -- so called from the name of the stud from which the breed originated in Vermont.

f trees of Southern India and Northern Africa. One species (Moringa pterygosperma) is the horse-radish tree, and its seeds, as well as those of M. aptera, are known in commerce as ben or ben nuts, and yield the oil called oil of ben.

To substitute motor-driven vehicles, or automobiles, for the horses and horse-drawn vehicles of (a fire department, city, etc.). - -Mo`tor*i*za"tion (#), n.