What is "thioxene"

Thioxene \Thi*ox"ene\, n. [Thiophene + xylene.] (Chem.) Any one of three possible metameric substances, which are dimethyl derivatives of thiophene, like the xylenes from benzene.

n. (context chemistry English) Any of three possible metameric substances that are dimethyl derivatives of thiophene, like the xylenes from benzene.