a clock controlled by a pendulum.

More fully pendule clock, a (usually small and ornamental) timepiece with a pendulum. Also more generally: any clock.

A pendulum clock or watch. Obsolete.

a timepiece controlled by a pendulum; a pendulum-clock.

A hanging clock with pendulum and weights exposed. Also attributive.

= grandfather clock n. at grandfather, n. compounds 2.

(originally a commercial name for) a weight-and-pendulum eight-day clock in a tall case.

a clock having a long case to accommodate the pendulum.

Short for grandfather clock n. at compounds 2.

a clock resembling a grandfather clock, but with a smaller case.

short for longcase clock n.

a clock similar to, but smaller than, a grandfather clock.

Short for grandmother clock n. at compounds 2.

Short for granddaughter clock n. at compounds 2.