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.
A dried extract made from the stomach lining of a ruminant, used in cheesemaking to curdle milk. See rennin. [Middle English, probably from Old English *rynet.] rennet, substance containing rennin, an enzyme having the property of clotting, or curdling, milk.It is used in the making of cheese and junket. dried extract made from the stomach lining of a ruminant, used in cheesemaking to curdle milk. See rennin. [Middle English, probably from Old English *rynet.] rennet, substance containing rennin, an enzyme having the property of clotting, or curdling, milk.