Definition that contains pluto
- 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