Dictionary
clep•sy•dra
Pronunciation: (klep'si-dru), [key]—
n.,
—pl. -dras, -draePronunciation: (-drē"). [key]
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.