What is "thiete"

n. (context organic compound English) An unsaturated four-membered heterocycle containing three carbon atoms, one sulfur atom and one double bond

Thiete is a heterocyclic compound containing an unsaturated four-membered ring with three carbon atoms and one sulfur atom. It is more commonly encountered not on its own, but in anellated derivatives, several of which have been synthesized. Thietes are generally not very stable.