|—n , pl -thae|
|1.||a small ulceration on a mucous membrane, as in thrush, caused by a fungal infection|
|2.||vet science another name for foot-and-mouth disease|
|[C17: via Latin from Greek: mouth-sore, thrush]|
aphtha aph·tha (āf'thə)
n. pl. aph·thae (-thē')
A minute painful ulcer on a mucous membrane of the mouth, often covered by a gray or white exudate.