A pathological condition of a part, an organ, or a system of an organism resulting from various causes, such as infection, genetic defect, or environmental stress, and characterized by an identifiable group of signs or symptoms.

 
  • 病,疾病有机体的某一部位、某一器官或系统处于病理状态,由各种因素引起,如传染、遗传缺陷或环境紧张,而且以被视为相同的一组表象或症状为特征
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