Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A polypeptide growth factor that is synthesized in the pituitary gland and the gonads and stimulates the secretion of follicle stimulating hormone.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A peptide that participates in the regulation of the menstrual cycle, cell proliferation, apoptosis, metabolism, and many other diverse functions.

Etymologies

activ(ate) + (inhib)in (from its activating follicle stimulating hormone).
(American Heritage® Dictionary of the English Language, Fourth Edition)

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