aphtha 
aphtha definition
aph·tha (af′t̸hə)
noun pl. aphthae -·thae (-t̸hē)
a small, white spot or pustule, caused by either viral or fungal infections, that appears in the mouth, on the lips, or in the gastrointestinal tract in certain diseases, as thrush
Etymology: ModL < L aphthae (occurring only in pl.) < Gr aphtha (pl. aphthai), eruption, thrush < haptein, to inflame
Related Forms:
- aphthous aph′·thous (-t̸həs) adjective
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