(definition) by Webster 1913 Wed Dec 22 1999 at 0:40:19

Knife"-edge` (?), n. Mech.

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.

Knife-edge file. See Illust. of File.

 

© Webster 1913.

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