ulcer

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a circumscribed inflammatory and often suppurating lesion on the skin or an internal mucous surface resulting in necrosis of tissue (Freq. 4)
• Syn:
ulceration
• Derivationally related forms:
ulcerous, ulcerate
• Hypernyms:
lesion
• Hyponyms:
aphthous ulcer, bedsore, pressure sore, decubitus ulcer, chancroid,
peptic ulcer, peptic ulceration, canker, canker sore, noli-me-tangere, noma