streptokinase Syllabification: (strep·to·ki·nase)Pronunciation: /ˌstreptəˈkīnās, -ˈkinās, -nāz/Definition of streptokinase noun Biochemistry an enzyme produced by some streptococci that is involved in breaking down red blood cells. It is used to treat inflammation and blood clots. streptokinase in other Oxford dictionaries Definition of streptokinase in the British & World English dictionary