tumbler
/`tʌmblɚ/
n.
One who performs feats of rolling, somersaulting, or the like, as on mats; an acrobat.
翻滚者；翻筋斗者；杂耍演员。
A drinking glass with straight sides, but without a stem.
(无柄、无脚之)平底玻璃杯。
平底玻璃杯 (Beverage Glass (Tumbler).svg by Will Murray ("Willscrlt") at http://willmurray.name/; Public Domain Image)A part of a lock that must be put in a certain position, generally by the key, before the bolt can be moved.
(锁中之)制栓(必须有钥匙与其特别之位置相合，方可将栓脱出)。
A kind of pigeon which, when flying, turns somersaults in the air.
翻飞鸽(=tumbler pigeon)。
Self-righting toy.
不倒翁。