from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An ancient device that measured time by marking the regulated flow of water through a small opening. Also called water glass.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A water clock, especially as used in the ancient world.
from the GNU version of the Collaborative International Dictionary of English
- n. 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.
from The Century Dictionary and Cyclopedia
- n. A device for measuring time by the amount of water discharged from a vessel through a small aperture, the quantity discharged in a given unit of time, as an hour, being first determined.
- n. A chemical vessel.
- n. [capitalized] [NL.] In zoology, a genus of mollusks; the watering-pot shells: now called Aspergillum.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. clock that measures time by the escape of water
Latin, from Greek klepsudra : kleptein, kleps-, to steal + hudōr, water; see wed-1 in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin clepsydra. (Wiktionary)