(n.) An instrument for determining and registering the variations in the size or volume of a limb, as the arm or leg, and hence the variations in the amount of blood in the limb.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). plethysmograph. Retrieved September 24, 2026, from http://smartdefine.org/plethysmograph/definitions/2046468 |
| Chicago | Webster's. 2011. "plethysmograph" http://smartdefine.org/plethysmograph/definitions/2046468 (accessed September 24, 2026). |
| Harvard | Webster's 2011, plethysmograph, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/plethysmograph/definitions/2046468>. |
| MLA | Webster's. "plethysmograph" 27 May 2011. Web. 24 September 2026. <http://smartdefine.org/plethysmograph/definitions/2046468> |