A technique that uses the mutation rate of biomolecules to deduce the time in prehistory when two or more life forms diverged.

Alternative spelling of analog clock

The regular timing of pulses from a pulsar. / A clock built to measure time based on the regular pulses from a pulsar.

plural of pulsar clock

plural of pocket clock

(now chiefly historical) A small portable timepiece; a pocket watch.

To continually look at the time to see how much longer one has to work or study.

A type of a molecular age estimation method based on DNA methylation levels.

A clock that displays the time (hours, minutes, and sometimes seconds) in digits, rather than by hands on a dial (like a analog clock).

plural of bum-clock