Source : Webster's Revised Unabridged Dictionary (1913)

Conhydrine \Con*hy"drine\ (? or ?), n. [Conium + hydrate.]
   (Chem.)
   A vegetable alkaloid found with conine in the poison hemlock
   ({Conium maculatum}). It is a white crystalline substance,
   {C8H17NO}, easily convertible into conine.