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peristalsis

noun
/ˌperɪˈstælsɪs/
/ˌperɪˈstælsɪs/
[uncountable] (biology生物)
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  1. the wave-like movements of the intestine, etc. caused when the muscles pull tight and relax(肠等的)蠕动
    Word Originmid 19th cent.: modern Latin, from Greek peristallein ‘wrap around’, from peri- ‘around’ + stallein ‘to place’.

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