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friction rub

friction murmur

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noun
med the sound, heard through a stethoscope, made by the rubbing together of the two inflamed layers of pericardium in patients with pericarditis or of pleura in patients with pleurisy
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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