gummic,a.Chem.|ˈgʌmɪk| [f. L. gumm-i gum n.2 + -ic.] gummic acid: an acid obtained from gum =Arabic acid(see Arabic a. 2). 1838T. Thomson Chem.Org. Bodies 157 Gummic acid was discovered by M. Simonin about the year 1830.1880Encycl.Brit. XI. 275/2 Gummic acid.