tumbler
- n. 不倒翁（玩具）；杂技演员；翻筋斗者；一杯的容量；滚筒；平底玻璃杯
英英释意
- 1. a gymnast who performs rolls and somersaults and twists etc.
- 2. a glass with a flat bottom but no handle or stem; originally had a round bottom
- 3. a movable obstruction in a lock that must be adjusted to a given position (as by a key) before the bolt can be thrown
- 4. pigeon that executes backward somersaults in flight or on the ground