[het-er-uh-sahy-klik, -sik-lik]
adjective Chemistry.
of or pertaining to the branch of chemistry dealing with cyclic compounds in which at least one of the ring members is not a carbon atom (contrasted with homocyclic ).
noting such compounds, as ethylene oxide, C 2 H 4 O.

1895–1900; hetero- + cyclic

heterocycle [het-er-uh-sahy-kuhl] , noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To heterocyclic
World English Dictionary
heterocyclic (ˌhɛtərəʊˈsaɪklɪk, -ˈsɪk-)
Compare homocyclic (of an organic compound) containing a closed ring of atoms, at least one of which is not a carbon atom

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Medical Dictionary

heterocyclic het·er·o·cy·clic (hět'ə-rō-sī'klĭk, -sĭk'lĭk)
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.
Cite This Source
American Heritage
Science Dictionary
heterocyclic   (hět'ə-rō-sī'klĭk, -sĭk'lĭk)  Pronunciation Key 
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature