epicycle [epicycles](a small circle whose centre is on the circumference of a larger circle) noun [UK: ˈe.pɪ.saɪkl] [US: ˈe.pɪ.saɪkəl]The epicycle made it possible for the Greeks to explain the planetary movements. = El epiciclo dio lugar a que los griegos explicasen los movimientos de los planetas.