An instrument or machine serving to measure time by the fall or flow, of a certain quantity of water; a clepsydra.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). water clock. Retrieved September 22, 2026, from http://smartdefine.org/water_clock/definitions/2080865 |
| Chicago | Webster's. 2011. "water clock" http://smartdefine.org/water_clock/definitions/2080865 (accessed September 22, 2026). |
| Harvard | Webster's 2011, water clock, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/water_clock/definitions/2080865>. |
| MLA | Webster's. "water clock" 28 May 2011. Web. 22 September 2026. <http://smartdefine.org/water_clock/definitions/2080865> |