from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The presence of pus in a body cavity, especially the pleural cavity.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A collection of pus within a naturally existing anatomical cavity (as opposed to an abscess, which occurs in a newly formed cavity).
from the GNU version of the Collaborative International Dictionary of English
- n. A collection of blood, pus, or other fluid, in some cavity of the body, especially that of the pleura.
from The Century Dictionary and Cyclopedia
- n. In pathology, the presence of pus in a pleural cavity; pyothorax. The word was formerly used for other purulent accumulations.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a collection of pus in a body cavity (especially in the lung cavity)
Medieval Latin empyēma, from Greek empuēma, from empuein, to suppurate; see pū̆- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek ἐμπύημα (empuēma) (Wiktionary)