nounpl. clep·sy·dras or clep·sy·drae
An ancient device that measured time by marking the regulated flow of water through a small opening. Also called water glass.
Origin of clepsydraLatin, from Greek klepsudrā : kleptein, kleps-, to steal + hudōr, water; see wed-1 in Indo-European roots.
- A water clock, especially as used in the ancient world.
- CD players
From Latin clepsydra.