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18.221.53.5
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1 definition found

From: Webster's Revised Unabridged Dictionary (1913)

 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.
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