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| clep·sy·dra [ klépsədrə ] (plural clep·sy·dras or clep·sy·drae [ klépsə dr ]) |
noun |
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| Definition: |
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ancient device for time measurement: an ancient device used for measuring time by noting the amount of water or mercury that passes through a small aperture during a particular period
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| [Mid-17th century. Via Latin< Greek klepsudra< kleptein "steal" + hudor "water"] |
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