ferric acid
noun
Any of a number of (sometimes hypothetical) oxyacids containing iron in a higher oxidation state; a solution containing such an acid, used especially to etch or dissolve copper.
- Often represented as HnFeO4, where n can be 2, 3, or 4..
Origin
Late 18th century; earliest use found in Robert Kerr (1757–1813), scientific writer and translator. After French acide ferrique.