Morus tinctoria

from The Collaborative International Dictionary of English v.0.48

Morintannic \Mo`rin*tan"nic\, a. [NL. Morus fustic + E. tannic.]
   (Chem.)
   Pertaining to, or designating, a variety of tannic acid
   extracted from fustic ({Chlorophora tinctoria}, formerly
   {Maclura tinctoria} and {Morus tinctoria}) as a yellow
   crystalline substance; -- called also {maclurin}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Morin \Mo"rin\, n. (Chem.)
   A yellow crystalline substance ({C15H10O7}) of acid
   properties extracted from fustic ({Chlorophora tinctoria}
   syn. {Maclura tinctoria}, formerly called {Morus tinctoria});
   -- called also {moric acid} and {natural yellow 8}. It is
   used as a dye for wool, giving a color from lemon yellow
   through olive to olive brown, depending on the metal with
   which it is mordanted.
   [1913 Webster +PJC]