- (n.) An instrument, variously constructed, used for measuring the velocity or discharge of water, as in rivers, from reservoirs, etc., and called by various specific names according to its construction or use, as tachometer, rheometer, hydrometer, pendulum, etc.; a current gauge.
- (n.) An instrument for determining the specific gravities of liquids, and thence the strength spirituous liquors, saline solutions, etc.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). hydrometer. Retrieved September 21, 2026, from http://smartdefine.org/hydrometer/definitions/2018087 |
| Chicago | Webster's. 2011. "hydrometer" http://smartdefine.org/hydrometer/definitions/2018087 (accessed September 21, 2026). |
| Harvard | Webster's 2011, hydrometer, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/hydrometer/definitions/2018087>. |
| MLA | Webster's. "hydrometer" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/hydrometer/definitions/2018087> |