Bible Dictionaries
Knife-Edge

Webster's Dictionary

(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.

Bibliography Information
Webster, Noah. Entry for 'Knife-Edge'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​k/knife-edge.html. 1828.