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Definition of Pus

Pus: A thick, whitish-yellow fluid that results from the accumulation of white blood cells, liquefied tissue, and cellular debris. Pus is commonly a sign of infection or foreign material in the body.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=5140
Last Editorial Review: 3/19/2012

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