Definition of activin in English:

activin

Pronunciation /ˈaktɪvɪn/

noun

Physiology
  • A gonadal glycoprotein which acts to stimulate the synthesis and secretion of follicle-stimulating hormone by the pituitary gland, and has a number of other physiological functions.

    Activin is a dimer and exists in two principal forms, usually termed activin A and activin B.

Origin

1980s. From active + -in, after inhibin (which has the opposite biological effect).