| 单词 | relaxin | 
| 释义 | Word Frequency relaxin(rɪˈlæksɪn) noun 1.  a mammalian polypeptide hormone secreted by the corpus luteum during pregnancy, which relaxes the pelvic ligaments  2.  a preparation of this hormone, used to facilitate childbirth  Word originC20: from relax + -in | 
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