- (n.) The muscular and tendinous partition separating the cavity of the chest from that of the abdomen; the midriff.
- (n.) A calcareous plate which divides the cavity of certain shells into two parts.
- (n.) A plate with an opening, which is generally circular, used in instruments to cut off marginal portions of a beam of light, as at the focus of a telescope.
- (n.) A dividing membrane or thin partition, commonly with an opening through it.
- (n.) A partition in any compartment, for various purposes.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). diaphragm. Retrieved September 25, 2026, from http://smartdefine.org/diaphragm/definitions/1997271 |
| Chicago | Webster's. 2011. "diaphragm" http://smartdefine.org/diaphragm/definitions/1997271 (accessed September 25, 2026). |
| Harvard | Webster's 2011, diaphragm, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/diaphragm/definitions/1997271>. |
| MLA | Webster's. "diaphragm" 27 May 2011. Web. 25 September 2026. <http://smartdefine.org/diaphragm/definitions/1997271> |