noun. A compound containing benzene or another aromatic hydrocarbon, or a univalent group derived from such a compound by removal of a hydrogen atom attached to the aromatic ring.

noun. A name introduced by Vorländer to designate a radical derived from an aromatic hydrocarbon, as phenyl, C₆H₅, tolyl, C₇H₇.

noun. Any univalent organic radical derived from an aromatic hydrocarbon by removing a hydrogen atom.

"In 1979 a new receptor was discovered, called the aryl hydrocarbon receptor, which binds specifically with dioxin and PCB."

alkyl  

acyl  alkoxy  diazonium  diphenyl  electro-negative