Căc′/o-ē′thēs, n.

n. [Lat. cacœthes, from Gr. κακοήθης, of ill habits, τὸ κακόηθες, an ill habit, from κακός, bad, and ἦθος, custom, habit.]

1. A bad custom or habit; a bad disposition.
2. (Med.) A bad quality or disposition in disease; an incurable ulcer.