1670s, "a prop, a support" (on which a lever turns), from Latin fulcrum "bedpost," from fulcire "to prop up, support" (see balk).
fulcrum ful·crum (ful'krəm, fŭl'-)n. pl. ful·crums or ful·cra (-krə)
The point or support on which a lever pivots.
An anatomical structure that acts as a hinge or a point of support.
The point on which a lever is balanced when a force is exerted.