canker sore
noun Pathology.
an ulceration of a mucous membrane, especially of the mouth.
Origin of canker sore
First recorded in 1905–10
Words nearby canker sore
canis major,
canis minor,
canister,
canities,
canker,
canker sore,
cankered,
cankerous,
cankerroot,
cankerworm,
cankle
Medical definitions for canker sore
canker sore
n.
A small painful ulcer of the mucous membrane of the mouth; an aphtha.
aphthous stomatitis recurrent aphthous ulcers ulcerative stomatitis