Definitions
1.NounA plant disease marked by gradual decay.
2.NounA region of dead plant tissue caused by such a disease.
3.NounA worm or grub that destroys plant buds or leaves; cankerworm.
4.NounA corroding or sloughing ulcer; especially a spreading gangrenous ulcer or collection of ulcers in or about the mouth.
5.NounAnything which corrodes, corrupts, or destroys."the canker of destitution and violence."
6.NounA kind of wild rose; the dog rose.
7.NounAn obstinate and often incurable disease of a horse's foot, characterized by separation of the horny portion and the development of fungoid growths. Usually resulting from neglected thrush.
8.NounAn avian disease affecting doves, poultry, parrots and birds of prey, caused by Trichomonas gallinae.
9.NounA crab.
10.VerbTo affect as a canker; to eat away; to corrode; to consume.
11.VerbTo infect or pollute; to corrupt.
12.VerbTo waste away, grow rusty, or be oxidized, as a mineral.
13.VerbTo be or become diseased, or as if diseased, with canker; to grow corrupt; to become venomous.