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.
the canker of destitution and violence.
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.