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Webster 1913 Edition
Empyema
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Emˊpy-e′ma
,Noun.
[NL., fr. Gr. [GREEK], from [GREEK] to suppurate; [GREEK] in + [GREEK] pus.]
(Med.)
A collection of blood, pus, or other fluid, in some cavity of the body, especially that of the pleura.
Dunglison.
☞ The term empyema is now restricted to a collection of pus in the cavity of the pleura.