papillary muscle

American  

noun

Anatomy.

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.

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Etymology

Origin of papillary muscle

First recorded in 1885–90

Example Sentences

These patches are especially common in the papillary muscles of the mitral valve—a fact which explains the occasional presence of systolic murmurs in typhoid fever.

From Project Gutenberg

M., contraction of the papillary muscles; Car., carotid pulse.

From Project Gutenberg

These were probably due to irregularity in the action of the papillary muscles as a consequence of the fatigue.

From Project Gutenberg