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Definition of Rale

Rale: An abnormal lung sound that can be heard through a stethoscope. Rales may be sibilant (whistling), dry (crackling), or wet (sloshy), depending on the amount and density of fluid refluxing back and forth in the air passages.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=5200
Last Editorial Review: 3/19/2012

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