- (n.) An instrument for measuring tension, especially that of the eyeball.
- (n.) An instrument for determining the rate of vibrations in tones.
- (n.) An apparatus for studying and registering the action of various fluids and drugs on the excised heart of lower animals.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). tonometer. Retrieved September 21, 2026, from http://smartdefine.org/tonometer/definitions/2073214 |
| Chicago | Webster's. 2011. "tonometer" http://smartdefine.org/tonometer/definitions/2073214 (accessed September 21, 2026). |
| Harvard | Webster's 2011, tonometer, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/tonometer/definitions/2073214>. |
| MLA | Webster's. "tonometer" 28 May 2011. Web. 21 September 2026. <http://smartdefine.org/tonometer/definitions/2073214> |