- closed-chain, closed-ring - having atoms linked by bonds represented in circular or triangular form
Antonyms: acyclic, open-chain (indirect, via cyclic)
- closed chain, ring - (chemistry) a chain of atoms in a molecule that forms a closed loop
--1 is a kind of chain, chemical chain
Antonyms: open chain
--1 has particulars: heterocyclic ring, heterocycle