(n.) A piece of steel sharpened to an acute edge or angle, and resting on a smooth surface, serving as the axis of motion of a pendulum, scale beam or other piece required to oscillate with the least possible friction.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). knife-edge. Retrieved September 23, 2026, from http://smartdefine.org/knife-edge/definitions/2025699 |
| Chicago | Webster's. 2011. "knife-edge" http://smartdefine.org/knife-edge/definitions/2025699 (accessed September 23, 2026). |
| Harvard | Webster's 2011, knife-edge, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/knife-edge/definitions/2025699>. |
| MLA | Webster's. "knife-edge" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/knife-edge/definitions/2025699> |