an ulceration of a mucous membrane, especially of the mouth.
THIS WORD OF THE DAY QUIZ IS HARDLY A DODDLE!
But you can ace it no problem if you remember the words from September 7–13, 2020!
Question 1 of 7
What does “Promethean” mean?
Origin of canker sore
First recorded in 1905–10
Words nearby canker sore
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Medical definitions for canker sore
A small painful ulcer of the mucous membrane of the mouth; an aphtha.aphthous stomatitis recurrent aphthous ulcers ulcerative stomatitis
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.