Medical Dictionary

peristalsis

noun peri·stal·sis
\ˌper-ə-ˈstl-səs, -ˈstäl-, -ˈstal-\
plural peri·stal·ses \-ˌsēz\

Medical Definition of PERISTALSIS

:  successive waves of involuntary contraction passing along the walls of a hollow muscular structure (as the esophagus or intestine) and forcing the contents onward—compare segmentation 2

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