noun. hormone secreted by the corpus luteum during the last days of pregnancy; relaxes the pelvic ligaments and prepares the uterus for labor.
- internal secretion
- -in (English)
- relax (English)
- relaxer (Old French (842-ca. 1400))
Example sentences of the word relaxin
1. Noun, singular or mass
Because relaxin relaxes all the joints in your body, you might experience joint pain and inflammation when you put pressure on your joints.