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curium.

A radioactive and highly fissile, silver-grey, metallic, transuranic chemical element (symbol Cm) with an atomic number of 96, which is artificially produced in a particle accelerator.

6 characters2 syllables approx.English language

Meaning & usage

noun/ˈkjʊə.ɹi.əm//ˈkjɔː.ɹi.əm//ˈkjʊ.ɹi.əm/General-American
  1. A radioactive and highly fissile, silver-grey, metallic, transuranic chemical element (symbol Cm) with an atomic number of 96, which is artificially produced in a particle accelerator.

    uncountable
  2. A radioactive and highly fissile, silver-grey, metallic, transuranic chemical element (symbol Cm) with an atomic number of 96, which is artificially produced in a particle accelerator. An atom of this element.

    countable
Where this word comes from

From Curie + -ium (suffix forming names of metallic elements), coined by the American scientists Glenn T. Seaborg (1912–1999), Ralph A. James (1920–1973), and Albert Ghiorso (1915–2010), who synthesized the element in 1944 and named it in honour of Pierre Curie (1859–1906) and Marie Skłodowska Curie (1867–1934) who, with Henri Becquerel, were awarded the 1903 Nobel Prize in Physics for discoveries in radioactivity.

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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.