afta
nounfeminine/ˈaftɐ/medium
af·ta
Definition
A small, painful ulcer or lesion that appears on the mucous membrane of the mouth (tongue, gums, cheeks).
When I'm stressed, I tend to get aftas in my mouth.
The afta is preventing her from eating acidic foods.
Etymology
Do latim 'aphtha', do grego 'aphtha' (úlcera na boca).