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.
Rennin enzymes are produced by the stomach cells of young mammals. Rennin is secreted in large amounts right after the birth and then its production gradually drops off. It is then eclipsed in importance by the Pepsin enzyme.ennin enzymes are produced by the stomach cells of young mammals. Rennin is secreted in large amounts right after the birth and then its production gradually drops off. It is then eclipsed in importance by the Pepsin enzyme.