benzopyrene
noun
ben·zo·py·rene ˌben-zō-ˈpī-ˌrēn 
-pī-ˈrēn
: a yellow crystalline carcinogenic hydrocarbon C20H12 found in coal tar
called also benzo[a]pyrene
Example Sentences
Recent Examples on the Web Now the soil and groundwater are contaminated with coal tar and 15 other toxins ranging from arsenic to compounds called benzopyrenes, which cause cancer. 
Lauren Ritchie, OrlandoSentinel.com, 19 Oct. 2017
Lauren Ritchie, OrlandoSentinel.com, 19 Oct. 2017 Word History
Etymology
International Scientific Vocabulary benz- + pyrene a crystalline hydrocarbon C16H10, from pyr- + -ene
First Known Use
1936, in the meaning defined above
Medical Definition
benzopyrene
noun
ben·zo·py·rene ˌben-zō-ˈpī(ə)r-ˌēn, -pī-ˈrēn
variants or benzpyrene
benz-ˈpī(ə)r-ˌēn, ˌbenz-pī-ˈrēn
: a mixture of two isomeric hydrocarbons C20H12 of which one is highly carcinogenic see benzo[a]pyrene