American quarter horse
Definition of American quarter horse
: quarter horse The trio will ride American quarter horses, the oldest surviving American breed and also the most numerous, with 800,000 registered worldwide. — Anne Hart, Atlanta Journal-Constitution, 1 Aug. 1996 American quarter horses are the sport's drag racers—full of speed and power and always ready to run. — John Erardi, Cincinnati Enquirer, 11 Sept. 2008
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