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clepsydra




Egyptian clepsydra
An Egyptian clepsydra
Also known as a water clock, an instrument in which the discharge of water from a storage tank is monitored in order to measure the passing of time. Clepsydras were used from ancient times until the Renaissance. "Clepsydra" is Greek for "water thief."


Related categories

   • TIME MEASUREMENT AND PUZZLES
   • HISTORY OF SCIENCE