plutonium

Từ điển Oxford Advanced Learner 8th

plu·to·nium BrE [pluːˈtəʊniəm] NAmE [pluːˈtoʊniəm] noun uncountable (symb. Pu)
a chemical element. Plutonium is ↑radioactive and is used in nuclear weapons and in producing nuclear energy.

Word Origin:
[plutonium] 1940s: from Greek ‘Pluto’, on the pattern of neptunium, being the next planet beyond Neptune.

Example Bank:
•one ton of plutonium extracted from spent nuclear fuel
•the capability to enrich uranium or reprocess plutonium
•the plane that dropped a plutonium bomb on the city of Nagasaki

• Từ đồng nghĩa / Synonyms:
  Pu, atomic number 94