Source : Webster's Revised Unabridged Dictionary (1913)

Wrightine \Wright"ine\, n. (Chem.)
   A rare alkaloid found in the bark of an East Indian
   apocynaceous tree ({Wrightia antidysenterica}), and extracted
   as a bitter white crystalline substance. It was formerly used
   as a remedy for diarrh[oe]a. Called also {conessine}, and
   {neriine}.