Mephitis

mephitis \mə-ˈfī-təs\ noun: 1. a noxious, pestilential or foul exhalation from the earth, 2. stench

mephitic \mə-ˈfi-tik\ adjective: 1. of, relating to, or resembling mephitis, 2. foul-smelling {mephitic vapors}

Etymology: Latin

Mefitis (or Mephitis) was the Roman goddess of volcanic vapors and other noxious fumes from the earth. Mephistopheles (or Mephisto) was the devil to whom Faust sold his soul.