Real Dictionary

benzene ring in American English
a structural unit in the molecules of aromatic organic compounds, represented by a ring of six atoms of carbon with alternate double bonds between the carbon atoms: in the molecule of benzene six atoms of hydrogen are attached to the ring, one to each ato
noun: the graphic representation of the structure of benzene as a hexagon with a carbon atom at each of its points. Each carbon atom is united with an atom of hydrogen, one or more of which may be replaced to form benzene derivatives. Also called benzene nucleu

benzene ring in British English
noun: the hexagonal ring of bonded carbon atoms in the benzene molecule or its derivatives