[ben-zoh-pahy-reen, -pahy-reen]
noun Chemistry.
a yellow, crystalline aromatic carcinogenic hydrocarbon, C 20 H 12 , consisting of five fused benzene rings, produced by incomplete combustion of organic material, as coal, petroleum, or tobacco.
Also, benzpyrene.

1925–30; benzo- or benz- + pyrene Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

benzopyrene ben·zo·py·rene (běn'zō-pī'rēn', -pī-rēn')
A yellow, crystalline, aromatic hydrocarbon that is a carcinogen found in coal tar and cigarette smoke.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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