peri·stal·sis /ˌpɛrəˈstɔlsəs, ˈstɑl, ˈstæl-/
  蠕動
  peri·stal·sis /ˌpɛrəˈstɔlsəs, ˈstɑl, ˈstæl-/ 名詞
  蠕動(運動)
  Per·i·stal·sis n.  Physiol. Peristaltic contraction or action.
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  peristalsis
       n : the process of wave-like muscle contractions of the
           alimentary tract that moves food along [syn: vermiculation]
           [ant: anastalsis]
       [also: peristalses (pl)]