macrocycle

A cyclic macromolecule or a macromolecular cyclic portion of a macromolecule.
Notes:
  1. See: chain (2)
  2. In the literature, the term 'macrocycle' is sometimes used for molecules of low molecular mass that would not be considered 'macromolecules' as specified in the definition given in this book.
Source:
PAC, 1996, 68, 2287 (Glossary of basic terms in polymer science (IUPAC Recommendations 1996)) on page 2298