resilin Syllabification: (res·i·lin)Pronunciation: /ˈrezələn/Definition of resilin noun Biochemistry an elastic material formed of cross-linked protein chains, found in insect cuticles, especially in the hinges and ligaments of wings. Origin: 1960s: from Latin resilire 'leap back, recoil' + -in1resilin in other Oxford dictionaries Definition of resilin in the British & World English dictionary