What is "terthiophene"

n. (context organic compound English) An oligomer of the heterocycle thiophene.

Terthiophene is the organic compound with the formula [CHS]CHS. It is an oligomer of the heterocycle thiophene, a shorter oligomer is dithienyl, and the parent polymer is polythiophene. In the most common isomer of terthiophene, two thienyl groups are connected via their 2 positions to a central thiophene, also at the carbon atoms flanking the sulfur.