Medical Dictionary

aphtha

play
noun aph·tha \ ˈaf-thə, ˈap-thə \
variants: also aptha play \ˈap-\

medical Definition of aphtha

plural aphthae also apthae play \-ˌthē\
1 :a speck, flake, or blister on the mucous membranes (as in the mouth or gastrointestinal tract or on the lips) characteristic of some diseases (as thrush)
2 :one of the vesicles filled with clear serous fluid that occur in the mouth, on the udder, and in the spaces between the digits of cloven-footed animals in some diseases usually used in plural
3 :a disease (as foot-and-mouth disease) characterized by aphthae

aphthic

play \-thik\ adjective

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