APHTHA

Etymology

Noun

aphtha (countable and uncountable, plural aphthae)

(pathology) candidiasis, oral thrush, thrush (fungal infection of the mucous membranes of the mouth caused by any species of yeast from the genus Candida)

An oral ulcer, disregarding the cause.

(veterinary medicine) foot-and-mouth disease

Source: Wiktionary

Aph"tha, n. Etym: [Sing. of Aphthæ.] (Med.) (a) One of the whitish specks called aphthæ. (b) The disease, also called thrush.

Source: Webster’s Unabridged Dictionary 1913 Edition