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.
Definition of RENNIN. : an enzyme that coagulates milk and is used in making cheese and junkets; especially: one from the mucous membrane of the stomach of a calf.See rennin defined for kids. ADVERTISEMENT.renn et + 1-in. an enzyme that coagulates milk and is used in making cheese and junkets; especially: one from the mucous membrane of the stomach of a calf.