Sulphine \Sul"phine\, n. (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.

Source: Webster's Revised Unabridged Dictionary (1913)