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 (bī-sĭk′lĭk, -sī′klĭk)
1. Consisting of or having two cycles.
2. Botany Composed of or arranged in two distinct whorls, as the petals of a flower.
3. Chemistry Relating to or being a molecule containing two rings, either by a fused or bridged arrangement.


(baɪˈsaɪklɪk; -ˈsɪklɪk) or


1. of, forming, or formed by two circles, cycles, etc
2. (Botany) (of stamens, petals, etc) arranged in two whorls
3. (Chemistry) (of a chemical compound) having atoms arranged in two rings fused together with at least two atoms common to each ring: naphthalene is bicyclic.


(baɪˈsaɪ klɪk, -ˈsɪk lɪk)

1. Also, bi•cy′cli•cal. consisting of or having two cycles or circles.
2. containing two rings of atoms in a molecule.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.bicyclic - having molecules consisting of two fused rings
cyclic - of a compound having atoms arranged in a ring structure
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References in periodicals archive ?
A main biologically active constituent of Horopito characterised to date, is the bicyclic sesquiterpene dialdehyde, polygodial, found in P colorata.
The Si/tech Innovation Award--Hui Yu, New Functional Polymers LLC, for "Novel Synthetic Methods for Bicyclic Coating Resin"
Key statement: A rubber material is described, modified with a barrier material in the form of a copolymer which can be produced via ring-opening metathesis polymerization of a) at least one olefin monomer selected from the group consisting of monocyclic olefin monomers having one or two endocyclic C--C double bonds and bicyclic olefin monomers having one endocyclic C--C double bond and b) at least one polycyclic olefin monomer having at least two C--C double bonds.
000003 Bicyclic or two-ring PAH Organic Compounds Naphthalene 0.
FK228 is one of a new class of anti-cancer agents known as histone deacetylase (HDAC) inhibitors, but it is the only bicyclic peptide in this group.
2]O (especially in the case of bicyclic oxirane silane coupling agents such as 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane), it also would seem prudent to use hydrophobic epoxy resins in the formulation of oxirane-based composites [29].
Such agents are based on bicyclic or Inonocylic dicarboxylic acid salts or monosalts (half-acid, half-salt) compounds, for example ciscalcium hexahydrophthalate.
The third part deals with eight groups of flavouring agents such as pyridine, pyrrole and qunoline derivatives; aliphatic and alicyclic hydrocarbons; aliphatic, linear, unsaturated aldehydes, acids and related alcohols, acetals and related esters; monocyclic and bicyclic secondary alcohols, ketones and related esters; amino acid and related substances; tetrahydrofuran and furanone derivateives and Phenyl substituted aliphatic alcohols and related aldehydes and esters.
In addition to hydrogen bonding to the obvious ammonium group of the bicyclic amine, the McBreen study has shown that binding between the aromatic hydrogens of the adsorbed aromatic substituent and the carbonyl oxygen also occurs.
Acetalization of lactol 6 in methanol gave volatile bicyclic methylacetals 7a as a mixture of exo- and endo-diastereomers, in a ratio of 1.
Therapies described include antiviral bicyclic furo[2,3-d] pyrimidine nucleoside analogues, and pain therapy.
Chlorendic anhydride solid reactive flame retardant contains a stable bicyclic structure.