uranium.
The element with atomic number 92 and symbol U. A radioactive silvery-grey metal in the actinide series.
Meaning & usage
The element with atomic number 92 and symbol U. A radioactive silvery-grey metal in the actinide series.
The element with atomic number 92 and symbol U. A radioactive silvery-grey metal in the actinide series. An atom of this element.
Where this word comes from
Etymology tree Ancient Greek οὐρᾰνός (ourănós) Ancient Greek Οὐρᾰνός (Ourănós)der. Latin Ūranusbor. English Uranus Proto-Indo-European *-om Proto-Italic *-om Latin -umder. English -ium English uranium After Uranus (the planet), + -ium.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.