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 rennet. 1a : the contents of the stomach of an unweaned animal and especially a calfb : the lining membrane of a stomach or one of its compartments (such as the fourth of a ruminant) used for curdling milk; also : a preparation of the stomach of animals used for this purpose.