A sharp, slim side or edge: "saying lines that teeter regarding knife-edge between literature and lunacy” ( Vincent Canby).
A wedge of metal made use of as a low-friction fulcrum for a balancing ray or lever.
a bit of steel sharpened to an acute advantage or direction, and resting on a smooth area, offering due to the fact axis of movement of a pendulum, scale beam, or any other piece necessary to oscillate using least feasible rubbing.
A precarious balance that may be upset by a very tiny force in either path.
Used except that as an idiom: the side of a knife.
some metal sharpened to an acute advantage or direction, and resting on a smooth surface, serving because the axis of motion of a pendulum, scale ray, or any other piece required to oscillate with all the the very least possible rubbing.
The wedge-like piece of steel which serves as the axis regarding the good side of which a scale-beam, a pendulum, or any thing expected to oscillate using the the very least possible rubbing rests and turns. See balance.