ammonio-
(əˈməʊnɪəʊ)
combining form of the word ammonium, indicating the presence of that basyl or its salts in a compound; thus ammonio-chloride of silver, ammonio-cupric sulphate, ammonio-magnesian phosphate = magnesium and ammonium phosphate.
| 1853 Family Her. 3 Dec. 510/2 The solution of ammonio-nitrate of silver. 1876 Harley Mat. Med. 207 Ammonio-chloride of Iron was discovered by Basil Valentine in the 14th cent. |