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Definition of Thumbscrew
1. Noun. Instrument of torture that crushes the thumb.
Generic synonyms: Instrument Of Torture
2. Noun. Screw designed to be turned with the thumb and fingers.
Generic synonyms: Screw
Definition of Thumbscrew
1. n. A screw having a flat-sided or knurled head, so that it may be turned by the thumb and forefinger.
Definition of Thumbscrew
1. [n -S]