1. the human race's martial, draft, racing, pleasure and companion animal of antiquity. Called also Equus caballus, a species sharing the genus with the ass, zebra and quagga. A member of the family Equidae in the order Perissodactyla, the odd-toed ungulates.
2. the word is also used to mean the entire male—the stallion.
Horses are classified in several ways: ancestry—warmblood, coldblood; use—draft, pony, carriage or carthorse, hack, polo pony, mustang, drafting or cutting horse, cowpony, jumper, hunter, standardbred, trotter, pacer, harness horse, eventer, dressage, rodeo, polocrosse, steeplechaser, remount, galloper; breeds—american saddle horse, american trotter, andalusian, anglo-arab, appaloosa, arab, australian pony, barb, belgian, campolino, cleveland bay, clydesdale, connemara pony, criollo, dales pony, dartmoor pony, dole pony, exmoor pony, falabella, fell pony, fjord pony, Fox Trotting Horse, friesian, Galiceno, galloway pony, gotland pony, hackney pony, hanover, holstein, highland pony, lipitsa, lusitano, morgan horse, new forest pony, overo, Pasos (Paso fino, Peruvian Paso, American Paso Fino), Palomino, percheron, quarter horse, shetland pony, shire, standardbred, suffolk horse, tennessee walking horse, thoroughbred, timor pony, trotter, welsh pony, Ysabella.
- h. bots — see gasterophilus.
- h. coat colors — see individual colors bay, black, brown, chestnut (3), gray.
- h. dentition — see dental formula.
- h. louse fly — see hippobosca.
- h. pox — see horsepox.
- h.-sick — said of a field that has had horses grazing on it for too long or at too heavy a stocking rate. The pasture is too rank and clumpy and the population of Strongyle spp. and other helminth larvae is likely to be high.
- h. sickness —
african horse sickness . - h. sickness fever — a clinically inapparent form of African horse sickness; usually a response in a vaccinated animal or one which is reinfected.
