quercitron

from WordNet (r) 3.0 (2006)

quercitron
    n 1: a yellow dye made from the bark of the quercitron oak tree
    2: medium to large deciduous timber tree of the eastern United
       States and southeastern Canada having dark outer bark and
       yellow inner bark used for tanning; broad five-lobed leaves
       are bristle-tipped [syn: {black oak}, {yellow oak},
       {quercitron}, {quercitron oak}, {Quercus velutina}]

from The Collaborative International Dictionary of English v.0.48

Quercitron \Quer"cit*ron\, n. [F. quercitron, the name of the
   name of tree; L. quercus an oak + citrus the citron tree.]
   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.
      [1913 Webster]

   2. Quercitrin, used as a pigment. See {Quercitrin}.
      [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Quercitrin \Quer"cit*rin\, n. [Cf. F. quercitrin. See
   {Quercitron}.] (Chem.)
   A glucoside extracted from the bark of the oak ({Quercus}) as
   a bitter citron-yellow crystalline substance, used as a
   pigment and called {quercitron}.
   [1913 Webster]

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