xylene /ˈzaɪliːn/ noun1 •Any of a group of three isomeric aromatic hydrocarbons, found in coal and wood tar.[…] proceeding, desperately, from such opiated catarrh preparations as Collis Brown's Mixture on to cocainized brain tonics, cigarettes soaked in absinthe, xylene in unventilated rooms, and so on […] — 2006 formsxylenes