aphtha

aphtha definition - medical

aph·tha (ăfˈthə)

noun pl. aph·thae (-thēˌ)
A minute painful ulcer on a mucous membrane of the mouth, often covered by a gray or white exudate.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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