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polycyclic

   Also found in: Dictionary/thesaurus, Medical, Wikipedia 0.01 sec.
polycyclic [¦päl·i′sī·klik]
(organic chemistry)
A molecule that contains two or more closed atomic rings; can be aromatic (such as DDT), aliphatic (bianthryl), or mixed (dicarbazyl).
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The research on polycyclic aromatic hydrocarbons (PAH) in smokeless tobacco adds to existing evidence that smokeless contains two-dozen other carcinogens that cause oral and pancreatic cancers.
Smokeless tobacco can be as dangerous as cigarettes by Asian News International
The five-year study which followed the development of 249 children living in the densely populated areas of Harlem and the Bronx in New York showed that exposure to environmental pollutants known as polycyclic aromatic hydrocarbons (PAHs) had an adverse affect on intelligence quotient.
Pollution affects children's IQ by AFP / AFP Global Edition
gov/tri/ In a consent agreement with EPA, the company has agreed to pay a $94,509 penalty for failing to file required annual reports on polycyclic aromatic compounds and benzo (g,h,i) perylene releases from its facility during calendar years 2002 through 2006.
EPA settles chemical release reporting violations at Hurlock, Md. ... by Frozen Food Digest
 
 
 
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