clepsydra: Meaning and Definition of

clep•sy•dra

Pronunciation: (klep'si-dru), [key]
— pl. -dras, -drae
  1. an ancient device for measuring time by the regulated flow of water or mercury through a small aperture.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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