Chem. [f. L. quercus oak + -IN1.] (See quots.)
1845. Penny Cycl., Suppl. I. 349/2. Quercin, a neutral crystalline substance procured from the bark of the oak.
1894. Watts’ Dict. Chem., Quercin … occurs in oakbark, being obtained from the mother-liquors in the preparation of quercite.
