1. The yellow inner bark of the quercus tinctoria, the American black oak, yellow oak, dyer’s oak, or quercitron oak, a large forest tree growing from Maine to eastern Texas.
2. Quercitrin, used as a pigment. See Quercitrin.
Origin: F. Quercitron, the name of the name of tree; L. Quercus an oak – citrus the citron tree.