valproic acidEnglishOxford New American Dictionaryvalproic acid /valˌprōik ˈasəd, vælˌproʊɪk ˈæsəd / ▸ noun Chemistry a synthetic crystalline compound with anticonvulsant properties, used (generally as salts) in the treatment of epilepsy. Alternative name: 2-propylpentanoic acid; chemical formula: C7H15COOH. – ORIGIN 1970s : valproic from valeric (see valeric acid) + pro(pyl) + -ic.