canker

【医】痈, 溃疡, 口疮, 马蹄癌; 癌肿病

【植】黑腐病(枯枝脱叶病); 植物肿瘤; (树的)蛀孔, 坏死

【动】毛虫, 尺蠖

[喻]腐败, 弊病

canker

an ulceration, esp of the lips or lining of the oral cavity

a disease of horses in which the horn of the hoofs becomes soft and spongy.an inflammation of the lining of the external ear, esp in dogs and cats, resulting in a discharge and sometimes ulceration.ulceration or abscess of the mouth, eyelids, ears, or cloaca of birds

an open wound in the stem of a tree or shrub, caused by injury or parasites

something evil that spreads and corrupts

to infect or become infected with or as if with canker