re-leasing factor

releasing factor

noun Biochemistry.
a substance usually of hypothalamic origin that triggers the release of a particular hormone from an endocrine gland.

Origin:
1950–55

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American Heritage
Medical Dictionary

releasing factor re·leas·ing factor (rĭ-le'sĭng)
n.
Abbr. RF
A substance of hypothalamic origin capable of accelerating the secretion of a given hormone by the anterior lobe of pituitary gland. Also called releasing hormone.

The American Heritage® Stedman's Medical Dictionary
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