Aphthae \Aph"th[ae]\, n. pl. [L., fr. Gr. ? (mostly in pl. ?,
Hipp.) an eruption, thrush, fr. ? to set on fire, inflame.]
(Med.)
Roundish pearl-colored specks or flakes in the mouth, on the
lips, etc., terminating in white sloughs. They are commonly
characteristic of thrush.
[1913 Webster]