ruberythrinic

from The Collaborative International Dictionary of English v.0.48
Ruberythrinic \Ru`ber*y*thrin"ic\, a. [L. ruber red + erythrin.]
   (Chem.)
   Pertaining to, or designating, an acid extracted from madder
   root. It is a yellow crystalline substance from which
   alizarin is obtained.
   [1913 Webster]
from The Collaborative International Dictionary of English v.0.48
Rubianic \Ru`bi*an"ic\, a. (Chem.)
   pertaining to, or derived from, rubian; specifically,
   designating an acid called also {ruberythrinic} acid. [Obs.]
   [1913 Webster]
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