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| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| the offspring of a zebra and a donkey. |
| clock on or clock in | |
| —vb | |
| (intr, adverb) to arrive at work, esp when it involves registering the time of arrival on a card | |
| clock in or clock in | |
| —vb | |
clock definition
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clock in definition
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clock in
Begin work, as in She clocked in late again. Also, clock out, end work, as in Please wait for me; I forgot to clock out. The allusion here is to punching a time clock, a device that punches the time on a card to record when an employee arrives and departs. [Late 1800s]