ANTITACTAE, or Antitactici, in Antiquity, a kind of Gnostics, who owned that God, the Creator of the Universe, was good and just; but asserted withal, that one of his Creatures had created Evil, and had engaged us to follow it, in order to set us in opposition to God the Creator; and that it becomes our Duty to oppose this Author of Evil, in order to avenge God of his Enemy. See GNOSTICS. Hence comes their Name; which is derived from the Greek ἀντιτάσσω, to oppose, I am contrary.