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Synonyms

canker sore

American

noun

Pathology.

an ulceration of a mucous membrane, especially of the mouth.

Other Word Forms

Noun Inflected Forms

canker sores

plural

Etymology

Origin of canker sore

First recorded in 1905–10

Compare meaning

How does canker-sore compare to similar and commonly confused words? Explore the most common comparisons:

canker sore vs. ulcer

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.