kallikrein
noun
kal·li·kre·in ˌka-lə-ˈkrē-ən 
kə-ˈli-krē-ən
kə-ˈli-krē-ən : a hypotensive protease that liberates kinins from blood plasma proteins and is used therapeutically for vasodilation
Example Sentences
Recent Examples on the Web However, the process of harvesting these therapeutically useful molecules from donor blood can yield preparations contaminated with another, potentially dangerous blood protein known as pre-kallikrein activator. 
Scientific American, 10 Dec. 2019
Scientific American, 10 Dec. 2019 Word History
Etymology
German, from Greek kallikreas sweetbread, pancreas, from kalli- beautiful (from kallos beauty) + kreas flesh — more at raw
First Known Use
1930, in the meaning defined above
Medical Definition
kallikrein
noun
kal·li·kre·in ˌkal-ə-ˈkrē-ən kə-ˈlik-rē-ən
kə-ˈlik-rē-ən : a hypotensive protease that liberates kinins from blood plasma proteins and is used therapeutically for vasodilation