Definitions from Wiktionary ( )

▸ noun:  (phytopathology) A plant disease marked by gradual decay.
▸ noun:  A region of dead plant tissue caused by such a disease.
▸ noun:  A worm or grub that destroys plant buds or leaves; cankerworm.
▸ noun:  A corroding or sloughing ulcer; especially a spreading gangrenous ulcer or collection of ulcers in or about the mouth.
▸ noun:  Anything which corrodes, corrupts, or destroys.
▸ noun:  A kind of wild rose; the dog rose.
▸ noun:  An 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.
▸ noun:  An avian disease affecting doves, poultry, parrots and birds of prey, caused by Trichomonas gallinae.
▸ verb:  (transitive) To affect as a canker; to eat away; to corrode; to consume.
▸ verb:  (transitive) To infect or pollute; to corrupt.
▸ verb:  (intransitive) To waste away, grow rusty, or be oxidized, as a mineral.
▸ verb:  (intransitive) To be or become diseased, or as if diseased, with canker; to grow corrupt; to become venomous.

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