a. Chem. Obs. [ad. mod.L. verdicus or F. verdique, f. F. verdir to become green. Cf. VERDOUS a.] (See quots.)
1836–41. Brande, Man. Chem. (ed. 5), 1198. Verdic Acid.—This acid was extracted by Runge from several of the Umbelliferæ and Plantagineæ, &c., but chiefly from the root of the Scabiosa succisa.
1843. Penny Cycl., XXVI. 256/1. Runge states that he found by analysis that verdic acid contains one equivalent of oxygen more than the verdous acid.
