MEPHITIC Meaning of MEPHITIC in English [ mɪ'fɪtɪk ]■ adjective literary (especially of a gas or vapour) foul-smelling.OriginC17: from late L. ~us , from mephitis 'noxious exhalation'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004