(of a movement 运动 moving in a circle around a central fixed point 旋转的；绕轴转动的 rotary motion 旋转运动
(of a machine or piece of equipment 机器或设备 having parts that move in this way 转动的 a rotary engine 旋转式发动机
Word Originmid 18th cent.: from medieval Latin rotarius, from rota ‘wheel’.