Chelidonic acid

from The Collaborative International Dictionary of English v.0.48

Chelidonic \Chel`i*don"ic\, a. [See {Celandine}.] (Chem.)
   Of, pertaining to, or derived from, the celandine.
   [1913 Webster]

   {Chelidonic acid}, a weak acid extracted from the celandine
      ({Chelidonium majus}), as a white crystalline substance.
      [1913 Webster]