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relaxin

[ri-lak-sin]
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noun Biochemistry, Pharmacology.
  1. a polypeptide hormone produced by the corpus luteum during pregnancy that causes the pelvic ligaments and cervix to relax during pregnancy and delivery.
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Origin of relaxin

First recorded in 1925–30; relax + -in2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for relaxin

relaxin

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
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Word Origin

C20: from relax + -in
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

relaxin in Medicine

relaxin

(rĭ-lăksĭn)
n.
  1. A female hormone secreted by the corpus luteum that helps soften the cervix and relax the pelvic ligaments in childbirth.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.