clepsydra

clepsydra

[klep-si-druh]
noun, plural clepsydras, clepsydrae [klep-si-dree] .
an ancient device for measuring time by the regulated flow of water or mercury through a small aperture.

Origin:
1640–50; < Latin < Greek klepsýdra, equivalent to kleps- (klep-, stem of kléptein to steal, conceal + -s- formative in derivation) + hydra, derivative of hýdōr water

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clepsydra (ˈklɛpsɪdrə)
 
n , pl -dras, -drae
Also called: water clock an ancient device for measuring time by the flow of water or mercury through a small aperture
 
[C17: from Latin, from Greek klepsudra, from kleptein to steal + hudōr water]

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