Definition of "water clock" []

• A clepsydra. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "[410] An interesting symbol of time's ceaseless passage; the reference is to a water clock (clepsydra)."
• "But though the buildings were lovely and the landscaping good enough to please a Roman heart, an hour on the water clock was quite enough time to discover that whatever wealth Ma of Comana might once have possessed had vanished."