canker

canker
noun
[mass noun]
  1. 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
  2. (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 thrush (in sense 2)
    同 thrush （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
    [in sing.]racism remains a canker at the heart of the nation.
    种族主义仍是该国的心腹毒瘤。
verb
  1. [no obj.](of woody plant tissue) become infected with canker
    （木本植物组织）感染溃疡；溃烂
    [as noun cankering]we found some cankering of the wood.
    我们发现这木材有些溃烂现象。
  2. [with obj][usu. as adj. cankered]infect with a pervasive and corrupting bitterness
    腐蚀，败坏
    he hated her with a cankered, shameful abhorrence.
    他恶毒而可耻地憎恶她。
派生
cankerous
adjective
语源
  1. Middle English (denoting a tumour): from Old French chancre, from Latin cancer 'crab' (see cancer)
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