Medical Dictionary

canker sore

noun

Medical Definition of CANKER SORE

:  a small painful ulcer especially of the mouth; especially :  a painful shallow ulceration of the oral mucous membranes that has a grayish-white base surrounded by a reddish inflamed area and is characteristic of aphthous stomatitis—compare cold sore

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July 04, 2015
stringent Hear it
rigorous, strict, or severe
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