thetine

from The Century Dictionary.

• noun In organic chemistry, the class-name of cyclic sulphinic anhydrids which resemble the betains and contain the group where R is a hydrocarbon radical such as methyl (CH₃).

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) Any one of a series of complex basic sulphur compounds analogous to the sulphines.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun chemistry Any of a series of complex basic sulphur compounds analogous to the sulphines.