tumbler

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tumbler

1. a person, esp a professional entertainer, who performs somersaults and other acrobatic feats
2. 
a. a part that moves a gear in a train of gears into and out of engagement
b. a single cog or cam that transmits motion to the part with which it engages
3. a breed of domestic pigeon kept for exhibition or flying. The performing varieties execute backward somersaults in flight

tumbler

[′təm·blər]
(engineering)
A device in a lock cylinder that must be moved to a particular position, as by a key, before the bolt can be thrown.
A device or mechanism in which objects are tumbled.

tumbler

In a lock, the locking mechanism which detains the bolt until set free by a key.
References in classic literature ?
He half-filled a second tumbler and shoved it across the table.
Twice again he refilled the tumbler, each time to the brim, and watched it disappear down my throat.
But the moment Samuel Bacon, a negro tumbler, got into the saddle, the spike sank home.
Tom was fond of hot punch--I may venture to say he was VERY fond of hot punch--and after he had seen the vixenish mare well fed and well littered down, and had eaten every bit of the nice little hot dinner which the widow tossed up for him with her own hands, he just ordered a tumbler of it by way of experiment.
Here Tom's eye wandered from the glass on the chimney-piece to the glass on the table; and as he felt himself becoming gradually sentimental, he emptied the fourth tumbler of punch and ordered a fifth.
She held up her hand for silence, and finished the second tumbler of maraschino punch.
Security had to check each bag for tumblers and other banned items.
Managing the case-cleaning process requires considerably more work than common vibratory tumblers, but Lyman's new Cyclone Rotary Tumbler ($230, LymanProducts.
Tumblers are basic pieces for each home and they are very simple to come by.
The tumblers are microwave- and dishwasher-safe, although today's phosphate-free dishwashing soaps can cause them to become clouded, The company recommends occasional cleaning with baking soda.
The significance of the two tumblers illustrated might never have been recognised had it not been for the observational powers - and inquisitiveness - of auction house specialist Jacquie Fairburn.
is offering an assortment of mugs, glasses, travel tumblers and water bottles that feature Marvel's Deadpool characters.