Emphysema
Pronunciation : Em`phy*se"ma
Part of Speech : n.
Etymology : [NL., from Gr. emphys?me.] (Med.)
Definition : Defn: A swelling produced by gas or air diffused in the cellular tissue. Emphysema of the lungs, Pulmonary emphysema (Med.), a common disease of the lungs in which the air cells are distended and their partition walls ruptured by an abnormal pressure of the air contained in them.
Source : Webster's Unabridged Dictionary, 1913