n. any sharply pointed projectionn. tubular extension at the base of the corolla in some flowersn. a sharp prod fixed to a rider's heel and used to urge a horse onwardv. incite or stimulate
n. 马刺, 刺激物, 鼓舞vt. 刺激, 激励, 用马刺策(马)前进vi. 用马刺驱马, 疾驰