Chem. Obs. [mod. f. Gr. ἀμφί both + -IDE ‘derivative.’] A name applied by Berzelius to salts, which he viewed as compounds of two oxides, sulphides, selenides, or tellurides, and which actually contain three elements (as sulphate of potash SO3 . K2O), as distinct from the haloid salts (as common salt, chloride of sodium, NaCl) which contain only two.
1842. Proc. Am. Phil. Soc., II. 220. An amphide salt is one consisting of an acid and a base, each containing an amphigen body.
1863. Watts, Dict. Chem. (1872), I. 201. The so-called amphid salts are those which belong to the water-type … whereas the haloid-compounds belong to the type HH or HCl.
