plutonium C2 Topic:Mathematics & Measurement US /pluːˈtoʊniəm/ See IPA manual Freq #16265 Meanings 1 noun The transuranic chemical element with atomic number 94 and symbol Pu: a silvery-gray fissile radioactive actinide metal that tarnishes when exposed to air. Plutonium? You mean this sucker's nuclear? 2 noun a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons Thesaurus Word family Derived forms diplutoniumnonplutoniumorganoplutoniumplutonateplutoniferousplutonyltransplutonium Related forms plutoplutonplutonianplutonicplutonism Common collocations plutonium bomb Noun + noun Etymology After Pluto (dwarf planet) + -n- + -ium. More in Wikipedia at plutonium § History. Topics Mathematics & Measurement External links Cambridge Dictionary Wiktionary Google Images # plutonium **Type:** Word **Level:** C2 **Part of speech:** noun **IPA (US):** /pluːˈtoʊniəm/ **Frequency rank:** 16265 ## Meanings 1. The transuranic chemical element with atomic number 94 and symbol Pu: a silvery-gray fissile radioactive actinide metal that tarnishes when exposed to air. 2. a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons ## Examples - Plutonium? You mean this sucker's nuclear? ## Derived Forms - diplutonium - nonplutonium - organoplutonium - plutonate - plutoniferous - plutonyl - transplutonium ## Related Forms - pluto - pluton - plutonian - plutonic - plutonism ## Etymology After Pluto (dwarf planet) + -n- + -ium. More in Wikipedia at plutonium § History. ## Topics - Mathematics & Measurement markdown