• (n.) A double thiophene nucleus, C6H4S2, analogous to thionaphthene, and the base of a large series of compounds.
Thi·oph'thene noun [ Abbreviated from thio na phthene .] (Chemistry) A double thiophene nucleus, C 6 H 4 S 2 , analogous to thionaphthene, and the base of a large series of compounds. [ Written also thiophtene .]