A @M03667@ that has one @E02092@ which enables it to act as a @M04019@, contributing only a single @M04018@ to a chain of the final macromolecule.
Source: PAC, 1996,
68, 2287. (
Glossary of basic terms in polymer science (IUPAC Recommendations 1996)) on page 2290 [
Terms] [
Paper]