Uranium

//jʊˈɹeɪniəm// noun

noun ·Moderate ·College level

Definitions

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

    "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. 2
    a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons wordnet

Synonyms

All synonyms
atomic number 92elementgoldironleadmetal

Example

More examples

"Uranium is used in the production of nuclear power."

Etymology

After Uranus (the planet), + -ium.

Related phrases

actino-uraniumdepleted uraniumeka-uraniumenriched uraniumhighly-enriched uraniumlow-enriched uraniumnatural uraniumslightly enriched uraniumslightly-enriched uraniumtriuranium octaoxideuranium Iuranium II

More for "uranium"

SynonymsSentencesPronunciationTranslate

Next best steps

Find stronger synonymsSee usage examplesCheck pronunciationBrowse writing guides

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.