endonuclease
noun [ C ] chemistry, biology specialized uk/ˌen.doʊˈnjuː.kli.eɪz/ us/ˌen.doʊˈnuː.kli.eɪz/
核酸内切酶，内切核酸酶
a chemical substance produced in the body that breaks connections in DNA (= the chemical that controls the structure and function of cells)