knife-edge
n. கத்தியின் கூர்விளிம்பு, (இயந்.) ஊசலி அசைவதற்கேதுவாயிருக்கிற எஃகு அச்சு.
Knife"*edge`, n. (Mech.) Defn: 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.