clepsydras

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• clepsydras — n. water clock, ancient instrument that measured time by regulated flow of water or mercury …   English contemporary dictionary

• clepsydra — /klep si dreuh/, n., pl. clepsydras, clepsydrae / dree /. an ancient device for measuring time by the regulated flow of water or mercury through a small aperture. [1640 50; < L < Gk klepsýdra, equiv. to kleps (klep , s. of kléptein to steal,… …   Universalium

• Zhang Heng — For other uses, see Zhang Heng (disambiguation). This is a Chinese name; the family name is Zhang. Zhang Heng (張衡) Born …   Wikipedia

• Solar time — On a prograde planet like the Earth, the sidereal day is shorter than the solar day. At time 1, the Sun and a certain distant …   Wikipedia

• Horology — (from Greek: ὥρα, hour, time and Greek: λόγος, logos, study, speech ; lit. the study of time) is the art or science of measuring time. Clocks, watches, clockwork, sundials, clepsydras, timers, time recorders and marine chronometers are all… …   Wikipedia

• Water clock — For the individual water clock at The Children s Museum of Indianapolis, see Water clock (Indianapolis). A display of two outflow water clocks from the Ancient Agora Museum in Athens. The top is an original from the late 5th century BC. The… …   Wikipedia

• Taqi al-Din — Muhammad ibn Ma ruf al Shami al Asadi (Arabic: تقي الدين محمد بن معروف الشامي السعدي, Turkish: Takiyuddin) (1526 ndash;1585) was a major Ottoman Turkish [cite journal last = Douglas | first = A. V. year =1963 title = Tenth International Congress… …   Wikipedia

• Alarm clock — Clock radio redirects here. For the clocks synchronised by radio signals, see Radio clock. Traditional wind up (keywound), mechanical, spring driven alarm clock …   Wikipedia

• eclipse — eclipser, n. /i klips /, n., v., eclipsed, eclipsing. n. 1. Astron. a. the obscuration of the light of the moon by the intervention of the earth between it and the sun (lunar eclipse) or the obscuration of the light of the sun by the intervention …   Universalium

• clepsydra — noun /ˈklɛpsɪdɹə/ A water clock, especially as used in the ancient world. They sat among the choiring clepsydras of the evening garden, time elapsing in a dozen ways, allowing their cigars to go out, keeping a companionable silence …   Wiktionary

• clepsydra — [ klɛpsɪdrə] noun (plural clepsydras or clepsydrae dri:) an ancient time measuring device worked by a flow of water. Origin ME: via L. from Gk klepsudra, based on kleptein steal + hudōr water …   English new terms dictionary