Origin of heterocyclic
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Examples from the Web for heterocyclic
Carbocyclic rings will next be treated, benzene and its allies in some detail; and finally the heterocyclic nuclei.
- (of an organic compound) containing a closed ring of atoms, at least one of which is not a carbon atomCompare homocyclic
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
- Containing more than one kind of atom joined in a ring.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- Of or relating to a compound containing a closed ring structure made of more than one kind of atom. Pyridine (C5H5N), for example, is a heterocyclic compound, as its ring contains five carbon atoms and one nitrogen atom. Compare homocyclic.
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