A polycyclic aromatic hydrocarbon, the result of incomplete combustion of organic matter at high temperatures, found in grilled meats, tobacco smoke, etc.
benzopyran
benzopyran
noun
(organic chemistry) Either of two isomeric bicyclic heterocycles consisting of a benzene ring fused to that of pyran, but especially 2-benzopyran
benzopyranyl
benzopyrazolone
benzothiopyran
benzothiopyran
noun
(organic chemistry) A bicyclic heterocycle consisting of a benzene ring fused to that of thiopyran