MEPHITIC Meaning of MEPHITIC in English — mephitically , adv./meuh fit"ik/ , adj.1. offensive to the smell. 2. noxious; pestilential; poisonous. [ 1615-25; mephiticus. See MEPHITIS, -IC ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012