pendulum

A body suspended from a fixed support so that it swings freely back and forth under the influence of gravity, commonly used to regulate various devices, especially clocks.

Something that swings back and forth from one course, opinion, or condition to another.

Anything that hangs down from a point of attachment and is free to swing.

In mech., a body so suspended from a fixed point as to move to and fro by the alternate action of gravity and its acquired energy of motion.

A chandelier or lamp pendent from a ceiling.

A guard-ring of a watch and its attachment, by which the watch is attached to a chain.

A pendulum that at some point of its path closes a circuit, this in turn either reporting the beats of the pendulum at distant stations for time-comparisons, or directly controlling a number of clocks. See electric clock, under clock.

See the adjectives.

A pump in which the reciprocating motion of the piston is controlled by a pendulum.

A pump the handle of which swings on either side of its center of suspension.