(n.) A collection of blood, pus or other fluid, in some cavity of the body, especially that of the pleura.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). empyema. Retrieved September 24, 2026, from http://smartdefine.org/empyema/definitions/2002843 |
| Chicago | Webster's. 2011. "empyema" http://smartdefine.org/empyema/definitions/2002843 (accessed September 24, 2026). |
| Harvard | Webster's 2011, empyema, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/empyema/definitions/2002843>. |
| MLA | Webster's. "empyema" 27 May 2011. Web. 24 September 2026. <http://smartdefine.org/empyema/definitions/2002843> |