- (n.) An old instrument of torture for compressing the thumb by a screw; a thumbkin.
- (n.) A screw having a flat-sided or knurled head, so that it may be turned by the thumb and forefinger.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). thumbscrew. Retrieved September 23, 2026, from http://smartdefine.org/thumbscrew/definitions/2072447 |
| Chicago | Webster's. 2011. "thumbscrew" http://smartdefine.org/thumbscrew/definitions/2072447 (accessed September 23, 2026). |
| Harvard | Webster's 2011, thumbscrew, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/thumbscrew/definitions/2072447>. |
| MLA | Webster's. "thumbscrew" 28 May 2011. Web. 23 September 2026. <http://smartdefine.org/thumbscrew/definitions/2072447> |