Antipapal :: Antipapal (a.) Opposed to the pope or to popery.
Antiparallel :: Antiparallel (a.) Running in a contrary direction.
Antiparallels :: Antiparallels (n. pl.) Straight lines or planes which make angles in some respect opposite in character to those made by parallel lines or planes.
Antipathetical :: Antipathetical (a.) Having a natural contrariety, or constitutional aversion, to a thing; characterized by antipathy; -- often followed by to..
Antipathic :: Antipathic (a.) Belonging to antipathy; opposite; contrary; allopathic.