Webster’s Revised Unabridged Dictionary · 1913
Leverage
Lev′er·age (lĕv′ẽr·āj or lē′vẽr·āj), n. The action of a lever; mechanical advantage gained by the lever.
Leverage of a couple (Mech.), the perpendicular distance between the lines of action of two forces which act in parallel and opposite directions. — Leverage of a force, the perpendicular distance from the line in which a force acts upon a body to a point about which the body may be supposed to turn.