The Collaborative International Dictionary
Antipathic
Antipathic \An`ti*path"ic\, a. [NL. antipathicus, Gr. ? of opposite feelings.] (Med.) Belonging to antipathy; opposite; contrary; allopathic.
Douglas Harper's Etymology Dictionary
antipathic
1830, from French antipathique; see antipathy + -ic. It tends to be used in medicine in place of antipathetic.
Wiktionary
antipathic
a. characterized by antipathy