mephitis

noun2

1. •
   A poisonous or foul-smelling gas, especially as emitted from the earth; an unpleasant smell.
2. •
   A dilution of fluids derived from skunks or polecats.

   • I do not see why Dr. Hensley should object to the internal administration of Variolinum any more than to that of lachesis, mephitis, etc. — 1907