Hyponyms (each of the following is a kind of lacrimator): chlorobenzylidenemalononitrile; CS gas (a tear gas that is stronger than CN gas but wears off faster; can be deployed by grenades or cluster bombs; can cause skin burns and fatal pulmonary edema)
Freebase(0.00 / 0 votes)Rate this definition: Renin. Renin, also known as an angiotensinogenase, is an enzyme that participates in the body's renin-angiotensin system âalso known as the renin-angiotensin-aldosterone axisâthat mediates extracellular volume, and arterial vasoconstriction.
Renin, which is primarily released by the kidneys, stimulates the formation of angiotensin in blood and tissues, which in turn stimulates the release of aldosterone from the adrenal cortex. Renin is a proteolytic enzyme that is released into the circulation primarily by the kidneys.