Polymelus (1902–1924) was a British Thoroughbred racehorse who was the leading sire of racehorses in Great Britain and Ireland for five years (1914, 1915, 1916, 1920, 1921). Among his most famous descendants are Secretariat and Northern Dancer. However, it was through his son Phalaris that he will forever be remembered. His great grandsire was Bend Or.