Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.


 (hĕt′ə-rō-sī′klĭk, -sĭk′lĭk)
Containing more than one kind of atom joined in a ring.

het′er·o·cy′cle (-sī′kəl) n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Chemistry) a heterocyclic compound
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.heterocycle - a compound containing a heterocyclic ring
chelate, chelate compound - a heterocyclic compound having a metal ion attached by coordinate bonds to at least two nonmetal ions
chemical compound, compound - (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
2.heterocycle - a ring of atoms of more than one kind; especially a ring of carbon atoms containing at least one atom that is not carbon
closed chain, ring - (chemistry) a chain of atoms in a molecule that forms a closed loop
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
This class of heterocycle is being examined with respect to its aromaticity and stability, particularly with reference to a variety of dienophiles.
Nowadays, nitrogen containing heterocycle is important substructure in many fields, especially in pesticides and medicines [1-5].
Synthesis and Fluorescent Property of Some Novel Benzothiazoyl Pyrazoline Derivatives Containing Aromatic Heterocycle, Dyes pigments, 70, 246-250, (2006).
Thus, the chromophores attached to two fused rings of five-membered heteroaromatic, such as substituted triazolo[3,4-b]thiadiazole heterocycle as shown in Fig.
Pyrazoles are chemical compounds of synthetic origin that have a five-membered heterocycle with two nitrogen atoms and three adjacent carbon atoms.
Imidazole is a planar, nontoxic aromatic heterocycle and is a member of the azole group, where inhibition mechanism involves adsorption onto the copper surface.
Types of Pigments: Blues (Phthalo); Greens (Phthalo); Reds (Quinacridone, Napthol); Speciality Pigments (Benzimidazolone, Azo Condensation); Yellows and Oranges (Azo and Heterocycle, Diarylides, Hansas, Specialties)
Acridine, one of the important nitrogen heterocycle, shows activity such as anti-herpes [45], antimalarial and antitumor [46], and larvicidal action [47].
Key statement: A method for preparing a functional polymer, the method comprising: terminating a living polymer chain with a functionalizing agent where the functionalizing agent is defined by the formula [pi]-[R.sub.1]-[alpha] where [pi] is a leaving group or an addition group, [R.sub.1] is a bond or a divalent organic group, and a is a sulfur-containing heterocycle selected from the group consisting of thiirane, thietane, thiolane, thiazoline, dihydrothiophene, thiadiazine, thioxanthene, thianthrene, phenoxathiin, dihydroisothiazole, and thienofuran group or substituted form thereof.