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papillary muscle

noun, Anatomy.
one of the small bundles of muscles attached to the ventricle walls and to the chordae tendineae that tighten these tendons during ventricular contraction.
Origin of papillary muscle
1885-90 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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papillary-muscle in Medicine

papillary muscle n.
Any of the group of myocardial bundles that terminate in the tendinous cords that attach to the cusps of the atrioventricular valves.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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