properdin Syllabification: (prop·er·din)Pronunciation: /prōˈpərdn/Definition of properdin noun Biochemistry a protein present in the blood, involved in the body’s response to certain kinds of infection. Origin: 1950s: from pro-2 'before' + Latin perdere 'destroy' + -in1properdin in other Oxford dictionaries Definition of properdin in the British & World English dictionary
