water clocks
Ancient liquid timers
Water clocks are ancient timekeeping devices that measure time by the regulated flow of water into or out of a container.
Among the oldest known time-measuring instruments, they were used across many civilizations before mechanical clocks.
The term usually appears in historical or educational contexts: The Egyptians used water clocks to track hours during the night.
- timekeepingMeasuring duration's passage
- marking timeProgressing only nominally
- horologyTimekeeping science and craft
- ancient EgyptNile civilization of antiquity
- flowUnbroken forward movement
steady flow · timer · watches · time and tide · Vitruvius · escapements · ancient · siphons · ancient technology · timepieces · Roman engineering · cistern · intervals · measurement · liquid · hours · temple · temple priests
- timekeepingwatch, watches, timer, calendar, hourglass
- ancient timekeepingsundials, gnomon, hourglasses, solar time, hemicycle
- Ancient Egyptpharaoh, pharaohs, sphinx, pyramids, hieroglyphics
- Ancient RomeRome, Julius Caesar, Caesar, gladiator, gladiators
- water systemsirrigation ditches, irrigation, pipes, tanks, wells
- Greek scienceAristotle, Archimedes, Euclid, Ptolemy, Hippocrates
water clocksatomic clocks
Devices measuring time via particle vibrations
digital clocks · quartz watches · smartwatches · digital watches · Apple Watch
water, clock, watered, waterfall, watering, waters, aquatic, clocks, clockwork