Cathartin

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  cathartin \ca*thar"tin\, n. (Chem.)
     The bitter, purgative principle of senna. It is a glucoside
     with the properties of a weak acid; -- called also {cathartic
     acid}, and {cathartina}.
     [1913 Webster]