Canker - Definition
canker
n 1: a fungal disease of woody plants that causes localized
damage to the bark
2: an ulceration (especially of the lips or lining of the mouth)
[syn: canker, canker sore]
3: a pernicious and malign influence that is hard to get rid of;
"racism is a pestilence at the heart of the nation";
"according to him, I was the canker in their midst" [syn:
pestilence, canker]
v 1: become infected with a canker
2: infect with a canker