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出典:Wiktionary
water clock (複数形 water clocks)
出典:『Wiktionary』 (2009/04/10 19:36 UTC 版)
water + clock
waterclock (複数形 waterclocks)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/12 20:16 UTC 版)
A water clock or clepsydra (Greek κλέπτειν kleptein, 'to steal'; ὕδωρ hudor, 'water') is any timepiece in which time is measured by the regulated flow of liquid into (inflow type) or out from (outflow type) a vessel where the amount is then measured.
water clock