An adjustable diaphragm, suggesting the iris of the eye in its action, for regulating the aperture of a lens, consisting of a number of thin pieces fastened to a ring. It is used in cameras and microscopes.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). iris diaphragm. Retrieved September 24, 2026, from http://smartdefine.org/iris_diaphragm/definitions/2023649 |
| Chicago | Webster's. 2011. "iris diaphragm" http://smartdefine.org/iris_diaphragm/definitions/2023649 (accessed September 24, 2026). |
| Harvard | Webster's 2011, iris diaphragm, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/iris_diaphragm/definitions/2023649>. |
| MLA | Webster's. "iris diaphragm" 27 May 2011. Web. 24 September 2026. <http://smartdefine.org/iris_diaphragm/definitions/2023649> |