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barium.

The chemical element (symbol Ba) with an atomic number of 56. It is a soft, reactive, silvery alkaline earth metal.

6 characters2 syllables approx.English language

Meaning & usage

noun/ˈbɛəɹɪəm/UK
  1. The chemical element (symbol Ba) with an atomic number of 56. It is a soft, reactive, silvery alkaline earth metal.

    uncountable · usually
  2. A single atom of this element.

    countable · usually
  3. Barium sulphate suspension.

    uncountable · usually
Where this word comes from

Coined by British chemist Humphry Davy in 1808, from baryta + -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.