From Longman Dictionary of Contemporary Englishtime clockˈtime clock noun [countable] BECa special clock that records the exact time when someone arrives at and leaves work
Examples from the Corpus
time clock• Ensure that you are familiar with any heating controls the system may have such as a time clock or programmer.• I was not looking at a time clock or hours.• Alternatively, a single softner operating on a time clock and regenerating during the night may be the best solution.• Dear Help Wanted: We punch a time clock and our employer has a rigid lateness policy.• If there were a time clock for murder, it would show one every twenty-six minutes.• Baby schedules did not fit any time clock.• A pseudo-variable which reads and sets the elapsed time clock.• The building had no water and the scoreboard had no time clock.From Longman Business Dictionarytime clockˈtime clock noun [countable]HUMAN RESOURCES a clock, often connected to a computer, that records the exact time that someone arrives at and leaves work 