mephitic
Concise Oxford English Dictionary © 2008 Oxford University Press:
mephitic /mɪˈfɪtɪk/
▶adjective literary (especially of a gas or vapour) foul-smelling.
– origin C17: from late L. mephiticus, from mephitis ‘noxious exhalation’.
'mephitic' also found in these Oxford entries:

