sulphine

from The Century Dictionary.

• noun A name given, in organic chemistry, to compounds containing the group R₃SX, where R is a hydrocarbon radical such as methyl, CH₃, and X a halogen atom or hydroxyl radical. The compounds are also called sulphonium derivatives, and resemble, in general constitution and properties, the corresponding derivatives of ammonium.

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

• noun (Chem.) Any one of a series of basic compounds which consist essentially of sulphur united with hydrocarbon radicals. In general they are oily or crystalline deliquescent substances having a peculiar odor; as, trimethyl sulphine, (CH3)3S.OH. Cf. sulphonium.

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

• noun Alternative spelling of sulfine.