SG Heritage Dictionary

Empyema [Noun] Webster's Dictionary 1913

A collection of blood, pus, or other fluid, in some cavity of the body, especially that of the pleura.

Empyema Encyclopedia Britannica

EMPYEMA (from ev, within, and -πvov, pus), a term in medicine applied to an accumulation of purulent fluid within the cavity of the pleura (see Pleurisy).

9th ed. Encyclopædia Britannica, vol. 8, p. 182
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