polycyclic

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Related to polycyclic hydrocarbons: Polynuclear aromatic hydrocarbons

pol·y·cyc·lic

 (pŏl′ĭ-sĭk′lĭk, -sī′klĭk)
adj.
Having two or more atomic rings in a molecule.

polycyclic

(ˌpɒlɪˈsaɪklɪk)
adj
1. (Chemistry) (of a molecule or compound) containing or having molecules that contain two or more closed rings of atoms
2. (Biology) biology having two or more rings or whorls: polycyclic shells; a polycyclic stele.
n
(Chemistry) a polycyclic compound: anthracene is a polycyclic.

pol•y•cy•clic

(ˌpɒl iˈsaɪ klɪk, -ˈsɪk lɪk)

adj.
pertaining to an organic compound containing several atomic rings, usu. fused.
[1865–70]
References in periodicals archive ?
Contract award: diagnostic market polycyclic hydrocarbons (hap) in pavements and roads and asbestos in civil engineering buildings and structures in the t9 tramway project linking paris porte de choisy in orly ville.
Five groups of compounds were separated and extracted from silica gel with ethyl ether: aliphatic hydrocarbons (AlHC), monocyclic hydrocarbons (MCHC), polycyclic hydrocarbons and some sulfur compounds (PCHC), neutral hetero-atomic (Nhet) and polar hetero-atomic (Phet) compounds.
With reference to figure 1, it is obvious that the two paint brands have comparable levels of the polycyclic hydrocarbons except the case where Phenanthrene is found in Glaxo but completely undetectable in Demcork.
A report by the former National Public Health Service, published in 2003, said: "The [briquettemaking] process generated large amounts of gas, tar, ammonia and other polycyclic hydrocarbons.
A report by the former National Public Health Service, published in 2003, said: "The [briquette-making] process generated large amounts of gas, tar, ammonia and other polycyclic hydrocarbons.

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