What is "dibenzofuran"

n. (context organic compound English) The tricyclic heterocycle in which two benzene rings are fused to that of furan; any of its derivatives, especially the halogenated derivatives that are similar to dioxins

Dibenzofuran is a heterocyclic organic compound with the chemical structure shown at right. It is an aromatic compound that has two benzene rings fused to a central furan ring. All the numbered carbon atoms have a hydrogen atom bonded to each of them (not shown in the image). It is a volatile white solid that is soluble in nonpolar organic solvents. It is obtained from coal tar, where it exists as a 1% component.