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peristaltic (adj.)

"of or pertaining to the involuntary muscular movements of the hollow organs of the body," especially the alimentary canal, 1650s, from Modern Latin, from Greek peristaltikos (Galen), literally "contracting around," from peri "around, about" (see peri-) + stalsis "checking, constriction," related to stellein "draw in, bring together; set in order," from PIE *stel-yo-, suffixed form of root *stel- "to put, stand, put in order," with derivatives referring to a standing object or place.

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