uranium — English Dictionary

Noun

1. The element with atomic number 92 and symbol U. A radioactive silvery-grey metal in the actinide series.

   Usage

   • Countable
   • Uncountable

   Examples

   More examples (1)

   The head of the UN’s nuclear watchdog says US strikes on Iran fell short of causing total damage to its nuclear program and that Tehran could restart enriching uranium “in a matter of months,” contradicting President Donald Trump’s claims the US set Tehran’s ambitions back by decades.

2. The element with atomic number 92 and symbol U. A radioactive silvery-grey metal in the actinide series. An atom of this element.

   Usage

   • Countable

Noun

1. a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons

   Synonyms

   Uatomic number 92

   Broader terms

   metallic elementmetal