What is "dithiane"

n. (context organic compound English) Any of three isomeric six-membered saturated heterocycles having four carbon atoms and two sulfur atoms; any derivative of these compounds

A dithiane is a heterocyclic compound composed of a cyclohexane core structure wherein two methylene bridges (-- units) are replaced by sulfur centres. The three isomeric parent heterocycles are 1,2-dithiane, 1,3-dithiane and 1,4-dithiane.