a yellow-white, more or less viscid substance produced by suppuration and found in abscesses, sores, etc., consisting of a liquid plasma in which white blood cells are suspended.
Origin: 1535–45; < L; akin to Gk pýon pus. See pyo-
1392, from L. pus "pus" (related to puter "rotten," see putrid), from PIE *pu- (cf. Skt. puyati "rots, stinks," putih "stinking, foul;" Gk. puon "discharge from a sore," pythein "to cause to rot;" Goth. fuls, O.E. ful "foul"), perhaps originally echoic of a natural exclamation of disgust.
Main Entry: pus Pronunciation: 'p&s Function: noun : thick opaque usually yellowish white fluid matter formed by suppuration and composed of exudatecontaining leukocytes, tissue debris, and microorganisms
pus (pŭs) n. A generally viscous, yellowish-white fluid formed in infected tissue, consisting of white blood cells, cellular debris, and necrotic tissue.