barium sulfate


Definition of barium sulfate

: a crystalline insoluble compound BaSO4 that is used especially as a pigment and extender, as a filler (as in fluids used in gas and oil drilling), and as a substance opaque to X-rays in medical photography of the digestive tract

Examples of barium sulfate in a Sentence

Recent Examples on the Web The oldest layer of crystals, which include the mineral barite (barium sulfate), formed at temperatures of about 100°C. Sid Perkins, Science | AAAS, "How the world’s largest geode grew to half the size of a small bedroom," 18 Oct. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'barium sulfate.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of barium sulfate

1865, in the meaning defined above

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The first known use of barium sulfate was in 1865

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Cite this Entry

“Barium sulfate.” Dictionary, Merriam-Webster, Accessed 2 Jul. 2020.

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barium sulfate


Medical Definition of barium sulfate

: a colorless crystalline insoluble salt BaSO4 occurring in nature as barite and used medically chiefly as a radiopaque substance

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