benzopyrene
Concise Oxford English Dictionary © 2008 Oxford University Press:
benzopyrene /ˌbɛnzə(ʊ)ˈpʌɪriːn/ (also benzpyrene)
▶noun Chemistry a polycyclic hydrocarbon which is the major carcinogen present in cigarette smoke.
'benzopyrene' also found in these Oxford entries:

