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| an atomic spatial arrangement that results from rotation of carbon atoms about single bonds within an organic molecule |
| the solid product resulting from the distillation of coal in an oven or closed chamber or by imperfect combustion, consisting principally of carbon |
benzopyrene ben·zo·py·rene (běn'zō-pī'rēn', -pī-rēn')
n.
A yellow, crystalline, aromatic hydrocarbon that is a carcinogen found in coal tar and cigarette smoke.