pernicious anemia

pernicious-anemia的词性：
n.（名词）

1. A severe anemia most often affecting older adults, caused by failure of the stomach to absorb vitamin B₁₂ and characterized by abnormally large red blood cells, gastrointestinal disturbances, and lesions of the spinal cord.
恶性贫血：往往是老年人最易患的一种严重贫血症，由胃丧失对维生素B₁₂的吸收而引发，症状为红细胞异常巨大、胃肠炎和脊髓损伤