closed chain

noun, Chemistry
1.
three or more atoms linked together to form a ring or cycle and represented accordingly by its structural formula.
Compare open chain.
Origin
1900-05
British Dictionary definitions for closed chain

closed chain

noun
1.
(chem) another name for ring1 (sense 18)
closed chain in Science
closed chain
  (klōsd)   
An arrangement of atoms of the same type that forms a ring. Benzene and naphthalene are closed-chain compounds.