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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.