heterocyclic

heterocyclic

[het-er-uh-sahy-klik, -sik-lik]
adjective Chemistry.
1.
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 ).
2.
noting such compounds, as ethylene oxide, C 2 H 4 O.

Origin:
1895–1900; hetero- + cyclic

heterocycle [het-er-uh-sahy-kuhl] , noun
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World English Dictionary
heterocyclic (ˌhɛtərəʊˈsaɪklɪk, -ˈsɪk-)
 
adj
Compare homocyclic (of an organic compound) containing a closed ring of atoms, at least one of which is not a carbon atom

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Medical Dictionary

heterocyclic het·er·o·cy·clic (hět'ə-rō-sī'klĭk, -sĭk'lĭk)
adj.
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.
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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.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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