racehorse, race horse, bangtail

a horse bred for racing

• thoroughbred — a racehorse belonging to a breed that originated from a cross between Arabian stallions and English mares
• pony — an informal term for a racehorse
• yearling — a racehorse considered one year old until the second Jan. 1 following its birth
• dark horse — a racehorse about which little is known
• mudder — a racehorse that runs well on a muddy racetrack
• nonstarter — a horse that fails to run in a race for which it has been entered
• pacer, pacemaker, pacesetter — a horse used to set the pace in racing
• trotting horse, trotter — a horse trained to trot; especially a horse trained for harness racing

• horse, Equus caballus — solid-hoofed herbivorous quadruped domesticated since prehistoric times