(historical) a person employed to read the time over a phone line / A service provided by telephone companies where people can get the time by phoning a certain number.

plural of clock face

Alternative form of grandfather clock / (card games) A form of patience in which cards are laid out in an arrangement resembling a clock face.

Biological clock.

A metaphorical clock representing when one is expected to die, e.g. when someone expects to have a short lifespan because of an illness.

plural of clock tower

(physics) A hypothetical clock, used to show time dilation, that would count the journeys of a single photon between two parallel mirrors.

(basketball) A timer measuring the length of time since the last shot. / (tennis) A countdown of the time remaining within which the current server must serve the ball.

A clock that shows time around the globe.

A plant, Thunbergia grandiflora.