columbin

from The Collaborative International Dictionary of English v.0.48

Columbin \Co*lum"bin\, n. (Chem.)
   A white, crystalline, bitter substance. See {Calumbin}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Calumbin \Ca*lum"bin\, n. (Chem.)
   A bitter principle extracted as a white crystalline substance
   from the calumba root. [Written also {colombin}, and
   {columbin}]
   [1913 Webster]