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Definition of Canker
1. Noun. A fungal disease of woody plants that causes localized damage to the bark.
2. Verb. Become infected with a canker.
3. Noun. An ulceration (especially of the lips or lining of the mouth).
4. Verb. Infect with a canker.
5. Noun. A pernicious and malign influence that is hard to get rid of. "According to him, I was the canker in their midst"
Definition of Canker
1. n. A corroding or sloughing ulcer; esp. a spreading gangrenous ulcer or collection of ulcers in or about the mouth; -- called also water canker, canker of the mouth, and noma.
2. v. t. To affect as a canker; to eat away; to corrode; to consume.
3. v. i. To waste away, grow rusty, or be oxidized, as a mineral.
Definition of Canker
1. to affect with ulcerous sores [v -ED, -ING, -S]
Medical Definition of Canker
1. 1. In cats and dogs, acute inflammation of the external ear and auditory canal. See: aphtha. 2. In the horse, a process similar to but more advanced than thrush; the horny frog is generally under-run with a whitish, cheeselike exudate, and the entire sole and even the wall of the hoof may be undermined. 3. In man, an outmoded term for aphthae. Origin: L. Cancer (05 Mar 2000)