这个词是什么意思？
A naturally radioactive element of the actinide metals series. It has the atomic symbol Pu, and atomic number 94. Plutonium is used as a nuclear fuel, to produce radioisotopes for research, in radionuclide batteries for pacemakers, and as the agent of fission in nuclear weapons.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D011005 · MeSH 2026。
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