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Related to polycyclic: Polycyclic aromatic hydrocarbons


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


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.
(Chemistry) a polycyclic compound: anthracene is a polycyclic.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌpɒl iˈsaɪ klɪk, -ˈsɪk lɪk)

pertaining to an organic compound containing several atomic rings, usu. fused.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
The property was formerly used for industrial operations until 1987 and is contaminated with chloroform, heavy metals, polycyclic aromatic hydrocarbons and PCBs.
Polycyclic aromatic hydrocarbons (PAHs) are assembly of organic compounds which are abundantly present in the atmosphere of heavily populated areas which are having vehicular exhausts as well (Zheng, 2009).
According to the researchers Chisom Obasi, Nkechi Okoye, Uche Ekpunobi and Rosemary Arinze of the Department of Pure and Industrial Chemistry, Faculty of Physical Sciences in the research titled 'Distribution and Risk Assessment of Polycyclic Aromatic Hydrocarbon Contamination Arising from Uncontrolled Electronic Waste Recycling in Aba, Nigeria,' the objective of the research was to study the level of polycyclic aromatic hydrocarbons in soils and the potential human health and ecological risk assessed.
Summary: TEHRAN (FNA)- Astronomers have made the first definitive interstellar detection of benzonitrile, an intriguing organic molecule that helps to chemically link simple carbon-based molecules and truly massive ones known as polycyclic aromatic hydrocarbons.
One example of these are polycyclic aromatic hydrocarbons (PAHs) that are considered as priority pollutants by the European Union (EU) and the Environmental Protection Agency (EPA) because they are carcinogenic and they can genetically mutate [3, 5-8] and what is more, these compounds could activate oxidative stress of DNA, hence damaging metabolic activation and the generation of reactive kinds of oxygen [9, 10] making the extraction, preconcentration, and determination of these compounds in the environment very important [11, 12].
In this paper, we focus on the structures of Polycyclic Aromatic Hydrocarbons, for short [PAH.sub.n], which play a role in organic materials and medical science.
Hepatic concentrations of total polycyclic aromatic hydrocarbons (n = 5 birds) were similar to background concentrations of polycyclic aromatic hydrocarbons previously found in yellow-eyed penguins from the South Island of New Zealand, but there were significantly higher concentrations of 1-methylnapthelene and 2-methylnapthelene in the birds found dead in this mortality cluster.
The health services on Friday recalled a smoked-sausage brand after lab tests indicated that the product exceeds the permitted level of Polycyclic Aromatic Hydrocarbons.
Polycyclic aromatic hydrocarbons (PAHs) are organic substances that contain two or more benzene rings.
A survey of a class of organic molecules called polycyclic aromatic hydrocarbon (PAH) has revealed that the rate of star formation in the early universe may have been much higher than previously thought.

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