Noun
ulcer -
a circumscribed inflammatory and often suppurating lesion on the skin or an internal mucous surface resulting in necrosis of tissue
ulceration
lesion any localized abnormal structural change in a bodily part
aphthous ulcer a blister on the mucous membranes of the lips or mouth or gastrointestinal tract
bedsore ,
decubitus ulcer ,
pressure sore a chronic ulcer of the skin caused by prolonged pressure on it (as in bedridden patients)
chancroid infectious venereal ulcer
peptic ulcer ,
peptic ulceration an ulcer of the mucous membrane lining of the alimentary tract
canker sore ,
canker an ulceration (especially of the lips or lining of the mouth)
noli-me-tangere a cancerous ulcer of soft tissue and bone
