a. Chem. [f. prec. + -IC.] Applied to acids containing the group SO . OH united to carbon, obtained by reducing the chlorides of the sulphonic acids.
1877. Jrnl. Chem. Soc., II. 734. Formation of Sulphinic Acids of the Fatty Group from the Chloranhydrides of the Sulphonic Acids.
1880. Miller’s Elem. Chem. (ed. 5), III. 57. A few acids have been obtained … derived from sulphurous acid in the same way that the sulphonic acids are derived from sulphuric acid. They may be termed sulphinic acids.
