three or more atoms linked together to form a ring or cycle and represented accordingly by its structural formula.
Compare open chain.
Origin of closed chain
First recorded in 1900–05
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
An arrangement of atoms of the same type that forms a ring. Benzene and naphthalene are closed-chain compounds.
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