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nounlarge mass of intrusive igneous rock believed to have solidified deep within the earth
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Definition that contains pluton
- granite plutonic igneous rock having visibly crystalline texture; generally composed of feldspar and mica and quartz
- weapons plutonium plutonium 239 that is recovered when nuclear weapons are disassembled; it is stored in plutonium pits
- weapons-grade plutonium plutonium 239 that is recovered when nuclear weapons are disassembled; it is stored in plutonium pits