ˌperəˈstȯlsə̇s, -tal- noun
( plural peristal·ses -lˌsēz)
Etymology: New Latin, from peristalticus peristaltic (from Greek peristaltikos ), after such pairs as Late Latin antitheticus : antithesis
: successive waves of involuntary contraction passing along the walls of the intestine or other hollow muscular structure and forcing the contents onward — compare segmentation