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heterocyclic    
a. 杂环的,不同环式的

杂环的,不同环式的

heterocyclic
adj 1: containing a closed ring of atoms of which at least one
is not a carbon atom
n 1: a compound containing a heterocyclic ring [synonym:
{heterocyclic compound}, {heterocyclic}, {heterocycle}]

Cyclic \Cyc"lic\ (s?k"l?k or s?"kl?k), Cyclical \Cyc"lic*al\
(s?k"l?-kal), a. [Cf. F. cycluque, Gr. kykliko`s, fr. ky`klos
See {Cycle}.]
1. Of or pertaining to a cycle or circle; moving in cycles;
as, cyclical time. --Coleridge.
[1913 Webster]

2. (Chemistry) Having atoms bonded to form a ring structure.
Opposite of {acyclic}.

Note: Used most commonly in respect to organic compounds.

Note: [Narrower terms: {bicyclic}; {heterocyclic};
{homocyclic, isocyclic}]

Syn: closed-chain, closed-ring.
[WordNet 1.5]

3. Recurring in cycles[2]; having a pattern that repeats at
approximately equal intervals; periodic. Opposite of
{noncyclic}.

Note: [Narrower terms: {alternate(prenominal),
alternating(prenominal)}; {alternate(prenominal), every
other(prenominal), every second(prenominal)};
{alternating(prenominal), oscillating(prenominal)};
{biyearly}; {circadian exhibiting 24-hour
periodicity)}; {circular}; {daily, diurnal};
{fortnightly, biweekly}; {hourly}; {midweek,
midweekly}; {seasonal}; {semestral, semestrial};
{semiannual, biannual, biyearly}; {semiweekly,
biweekly}; {weekly}; {annual, yearly}; {biennial};
{bimonthly, bimestrial}; {half-hourly}; {half-yearly};
{monthly}; {tertian, alternate(prenominal)};
{triennial}]
[WordNet 1.5]

4. Marked by repeated cycles[2].
[WordNet 1.5]

{Cyclic chorus}, the chorus which performed the songs and
dances of the dithyrambic odes at Athens, dancing round
the altar of Bacchus in a circle.

{Cyclic poets}, certain epic poets who followed Homer, and
wrote merely on the Trojan war and its heroes; -- so
called because keeping within the circle of a single
subject. Also, any series or coterie of poets writing on
one subject. --Milman.
[1913 Webster]


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  • Heterocyclic compound - Wikipedia
    Examples of heterocyclic compounds include all of the nucleic acids, the majority of drugs, most biomass (cellulose and related materials), and many natural and synthetic dyes
  • Heterocyclic compound | Definition, Examples, Structure, Nomenclature . . .
    Heterocyclic compound, any of a major class of organic chemical compounds characterized by the fact that some or all of the atoms in their molecules are joined in rings containing at least one atom of an element other than carbon (C)
  • Heterocyclic Chemistry - Michigan State University
    Heterocyclic rings are found in many naturally occurring compounds Most notably, they compose the core structures of mono and polysaccharides, and the four DNA bases that establish the genetic code
  • Heterocyclic compounds: Nomenclature, Types, Applications
    Heterocyclic compounds contain at least one heteroatom (atom other than carbon) in the cyclic ring structure The three most frequent heteroatoms are nitrogen (N), oxygen (O), and sulfur (S)
  • Heterocyclic chemistry
    Heterocyclic chemistry comprises cyclic compounds containing in the ring structure one or more atoms other than carbon
  • Heterocyclic compounds: The Diverse World of Ringed Molecules
    Heterocyclic compounds are a diverse class of organic molecules that play a pivotal role in the fields of chemistry, biology, and materials science These compounds contain at least one heteroatom (an atom other than carbon) within a cyclic ring structure
  • HETEROCYCLIC Definition Meaning - Merriam-Webster
    The meaning of HETEROCYCLIC is relating to, characterized by, or being a ring composed of atoms of more than one kind How to use heterocyclic in a sentence
  • Heterocycle: Organic Chemistry Study Guide | Fiveable
    The study of heterocyclic chemistry is essential for the development of new therapeutic agents, as many clinically important drugs contain heterocyclic moieties Understanding the reactivity and structural features of heterocycles is vital for designing and synthesizing novel compounds with desired pharmacological activities
  • What Defines a Heterocyclic Compound? - Biology Insights
    Beyond medicine, heterocyclic compounds find broad utility in industrial applications They are integral to materials science, forming the basis for various polymers, plastics, and synthetic fibers that possess unique properties like strength, flexibility, or heat resistance
  • Heterocyclic Compounds -Definition, Classification, Examples . . .
    Heterocyclic compounds are cyclic compounds with at least one atom other than carbon in the ring, like N, P, O, S, and so on Most heterocyclic compounds contain only nitrogen, oxygen, and sulphur as heteroatoms





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