Aph’thōus, a.

(ăf’thus), a. [Fr. aphtheux, from Gr. ἄφθα (mostly in pl., ἄφθαι, Hipp.), an erysipelatous eruption in the mouth, from ἅπτω, to set on fire, to inflame.] Pertaining to the thrush (aphthæ); of the nature of the thrush, or ulcerous affection of the mouth. Bigelow.