Timepiece.
An alarm clock does not have a chemical name. It is a mechanical or electro-mechanical device.
Merewether clock tower
Another name for the clocks that are used for clocking in is the time clock, or employee time clock. The time clock is an employee time tracking system.
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Cogsworth
Another name for sand clock is hour glass
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A clock face is also called a dial, face dial, clock face dial, or dial face.
The colloquial name is 'Big Ben' - though that is actually the name of the bell inside the clock tower.Big Ben - although strictly speaking, that is the nickname of the Great Bell and not the whole clock and tower.
Weltzeituhr
it isi a stopwatch
pin clock