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Definition of Orthoacid
1. Noun. (inorganic chemistry) the member of a series of oxyacids of a particular element that has the highest number of hydroxyl groups ¹
¹ Source: wiktionary.com
Medical Definition of Orthoacid
1. An acid in which the number of hydroxyl groups equals the valence of the acid-forming element; e.g., C(OH)4, orthocarbonic acid. When there is no such acid, the one that most nearly approaches this condition is sometimes called an orthoacid; e.g., OP(OH)3, orthophosphoric acid. (05 Mar 2000)