'heterocyclic' definitions:
Definition of 'heterocyclic'
From: WordNet
adjective
Containing a closed ring of atoms of which at least one is not a carbon atom
noun
A compound containing a heterocyclic ring [syn: heterocyclic compound, heterocyclic, heterocycle]
Definition of 'heterocyclic'
From: GCIDE
- 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]