这个词是什么意思？
A trace element that is a component of vitamin B12. It has the atomic symbol Co, atomic number 27, and atomic weight 58.93. It is used in nuclear weapons, alloys, and pigments. Deficiency in animals leads to anemia; its excess in humans can lead to erythrocytosis.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D003035 · MeSH 2026。
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