Chem. [f. L. querci- oak- + TANNIN.] A form of tannin obtained from oak-bark. So Quercitannic a., in quercitannic acid = quercitannin.
1845. W. Gregory, Outl. Org. Chem., 416. Tannic Acid … Syn. Quercitannic Acid, Tannine. This acid occurs chiefly in oak-bark and in nut-galls.
1852. Morfit, Tanning & Currying (1853), 78. The tannin of tea is similar in properties to quercitannin.
1895. Naturalist, 25. A tannin, which is probably quercitannin.
