rotary engine
noun
1- an engine which produces rotary motion or which has a rotating part or parts, in particular旋转式发动机, 转缸式发动机, 尤指：
1.1
- an aircraft engine with a fixed crankshaft around which cylinders and propeller rotate飞机的旋转式发动机。
1.2
- a Wankel engine汪克尔发动机。