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.
renâ¢net. 1. the lining membrane of the fourth stomach of a calf or of the stomach of certain other young animals. 2. the rennin-containing substance from the stomach of an unweaned animal, esp. a calf. 3. a preparation of the rennet membrane used esp. in making cheese.[1400â50; compare Old English gerennan, Old High German gerennen to coagulate].. the rennin-containing substance from the stomach of an unweaned animal, esp. a calf. 3. a preparation of the rennet membrane used esp. in making cheese. [1400â50; compare Old English gerennan, Old High German gerennen to coagulate].