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Meaning of papillary muscle

pap'illary mus'cle

Pronunciation: [key]
— Anat. Anat.
  1. one of the small bundles of muscles attached to the ventricle walls and to the chordae tendineae that tighten these tendons during ventricular contraction.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.