A clock or chronometer is a device that measures and displays time. The clock is one of the oldest human inventions, meeting the need to measure intervals...

CLOCK (backronym for circadian locomotor output cycles kaput) is a gene encoding a basic helix-loop-helix-PAS transcription factor that is known to affect...

The Clock or The Clocks may refer to: The Clock (1917 film), a silent American film The Clock (1945 film), an American film The Clock (2010 film), a 24-hour...

practice of advancing clocks to make better use of the longer daylight available during summer so that darkness falls at a later clock time. The typical implementation...

The Doomsday Clock is a symbol that represents the likelihood of a human-made global catastrophe, in the opinion of the members of the Bulletin of the...

alarm clock or alarm is a clock that is designed to alert an individual or group of people at a specified time. The primary function of these clocks is to...

is the nickname for the Great Bell of the Great Clock of Westminster, and, by extension, for the clock tower itself, which stands at the north end of the...

The Prague astronomical clock or Prague Orloj (Czech: Pražský orloj [praʃskiː orloj]) is a medieval astronomical clock attached to the Old Town Hall in...

An atomic clock is a clock that measures time by monitoring the resonant frequency of atoms. It is based on atoms having different energy levels. Electron...

The modern 24-hour clock is the convention of timekeeping in which the day runs from midnight to midnight and is divided into 24 hours. This is indicated...