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- DictionaryCan·ker/ˈkaNGkər/
noun
- 1. a destructive fungal disease of apple and other trees that results in damage to the bark: "cut out lesions on branches caused by canker"
- 2. an ulcerous condition or disease of a human or animal.
verb
- 1. (of a plant or part of a plant) become infected with canker: "the tree is apt to canker in poor soils"