Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of rubian is as below...

Rubian :: Rubian (n.) One of several color-producing glycosides found in madder root.

Rubianic :: Rubianic (a.) pertaining to, or derived from, rubian; specifically, designating an acid called also ruberythrinic acid..

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