atomic clock An extremely precise clock whose rate is controlled by the vibration of particular atoms or molecules whose frequency does not change. The standard kind of atomic clock, which is based on the vibrations of cesium atoms, gains or loses less than one second in three million years. ...
The meaning of ATOMIC CLOCK is a precision clock that depends for its operation on an electrical oscillator regulated by the natural vibration frequencies of an atomic system (such as a beam of cesium atoms).
The meaning of CLOCK is a device other than a watch for indicating or measuring time commonly by means of hands moving on a dial; broadly : any periodic system by which time is measured. How to use clock in a sentence.
She looked/glanced at theclockon the wall. It was now 2:30. the hands/face of theclock a digitalclock —often used before another noun aclocktower [=a tower with a clock on at least one of its sides] aclockface —comparewatch;see alsoalarm clock,atomic clock,biological clock,body clock...
A clock that keeps time by the radiation frequency associated with a particular atomic reaction. Atomic clocks are used in official timekeeping.
clock 1 (klŏk) n. 1. An instrument other than a watch for measuring or indicating time, especially a mechanical or electronic device having a numbered dial and moving hands or a digital display. 2. A time clock. 3. A source of regularly occurring pulses used to measure the passage of...
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This is an enthralling story of timeslips, a tardis-like grandfather clock, hidden caves, hypnosis and ancient druids. Kent, Gabrielle: Alfie Bloom and the Secrets of Hexbridge Castle Much as a grandfather clock depends on the swinging of a pendulum, his prototype atomic clock relied on this...
The rapid increase in accuracy and stability of optical atomic clocks compared to the caesium atomic clock as the primary standard of time and frequency asks for a future redefinition of the second in the International System of Units (SI). The status of the optical clocks based on either ...
The meaning of ATOMIC is of, relating to, or concerned with atoms. How to use atomic in a sentence.