peptidyl
/ˈpɛptɪdʌɪl/ /ˈpɛptɪdɪl/Biochemistry
noun
A radical formed from a peptide, especially by the removal of an NH2 group from an amide group. Usually attributive.
Origin
1960s; earliest use found in Proceedings of the National Academy of Sciences of the United States of America. From peptide + -yl.