a kinin, CHNO, released from blood plasma by some snake venoms and certain other enzymes, which slows intestinal contractions, lowers blood pressure, etc.
< brady- + Gr kinein, to move: see kinetic
See bradykinin in American Heritage Dictionary 4
A biologically active polypeptide, consisting of nine amino acids, that forms from a blood plasma globulin and mediates the inflammatory response, increases vasodilation, and causes contraction of smooth muscle.
Origin: + Greek kīnein, to move; see kei-2 in Indo-European roots