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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