quercitron
/ˈkwəːsɪtr(ə)n/noun
1The inner bark of the American black oak, Quercus velutina, used as a source of the yellow dye quercitrin and in tanning (more fully quercitron bark).
2More fully quercitron oak. The black oak, Quercus velutina, of eastern North America. Now rare.
Origin
Late 18th century; earliest use found in Statute 32 George III. Blend of quercine and citron adjective.
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