noun (plural clepsydras or clepsydrae /-driː/)
An ancient time-measuring device worked by a flow of water.
More example sentences
- Further back, the Chinese and the Romans used clepsydras (water clocks) at about the same time, although Egyptian sundials go further back.
- Of course the sun could not be used to tell the time at night and clepsydras or water clocks were in use in Egypt by 1500 BC.
- The device they used to ensure fairness was the clepsydra - ‘captured water’ - and was a simple jar with a hole.
late Middle English: via Latin from Greek klepsudra, based on kleptein 'steal' + hudōr 'water'.
Definition of clepsydra in:
- The US English dictionary