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promethium.

A metallic chemical element (symbol Pm) with an atomic number of 61.

10 characters3 syllables approx.English language

Meaning & usage

noun/pɹoʊˈmiːθiəm/
  1. A metallic chemical element (symbol Pm) with an atomic number of 61.

    uncountable
  2. A metallic chemical element (symbol Pm) with an atomic number of 61. An atom of this element.

    countable
Where this word comes from

1945. From the name of the Greek god Prometheus, who stole the fire from Mount Olympus and brought it down to mankind + -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.