clepsydra Meaning, Definition & Usage
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noun clock that measures time by the escape of water
water clock; water glass.
WordNet
Clep"sy*dra noun
Etymology
L. from Gr. to steal, conceal + water.Definitions
A water clock; a contrivance for measuring time by the graduated flow of a liquid, as of water, through a small aperture. See Illust. in Appendix .