a necrotic fungal disease of apple and other trees that results in damage to the bark

（苹果等树的）溃疡病。

[count noun]an open lesion in plant tissue caused by infection or injury

（因感染或损伤而引起的）植物组织溃疡。

fungal rot in some fruits and vegetables, e.g. parsnips and tomatoes

（欧洲萝卜、西红柿等水果、蔬菜的）真菌腐烂。

Medicine an ulcerous condition or disease, in particular

【医】 溃疡，尤指：

(亦作canker sore)chiefly US a small ulcer of the mouth or lips

〈主美〉 　口疮。

another term for THRUSH2 (in sense 2).

同THRUSH2 （义项2）。

ulceration of the throat and other orifices of birds, typically caused by a protozoal infection

（尤指因原生动物感染而引起的）鸟喉（或其他体孔）溃疡。

(亦作ear canker)inflammation of the ear of a dog, cat, or rabbit, typically caused by a mite infestation

耳溃疡（尤指因螨虫感染而引起的狗、猫或兔外耳道炎症）。

figurative a malign and corrupting influence that is difficult to eradicate

〈喻〉 　恶痈，恶疽

[no obj.](of woody plant tissue)become infected with canker

（木本植物组织）感染溃疡；溃烂

[with obj.][usu. as adj. cankered]infect with a pervasive and corrupting bitterness

腐蚀，败坏