thiophen in British English
(ˈθaɪəʊˌfɛn) or thiophene (ˈθaɪəʊˌfiːn)
nouna colourless liquid heterocyclic compound found in the benzene fraction of coal tar and manufactured from butane and sulphur. It has an odour resembling that of benzene and is used as a solvent and in the manufacture of dyes, pharmaceuticals, and resins. Formula: C4H4S
Also called: thiofuran