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 Most critically, the all-important barium sulfate needs to be mined in ways that can be environmentally damaging. Jackie Appel, Popular Mechanics, 14 July 2023 The paint has a very high concentration of barium sulfate, a highly reflective material that is key to the paints cooling capabilities. Jackie Appel, Popular Mechanics, 14 July 2023 In 1973, the uranium processor Cotter Corp. took hazardous leached barium sulfate from Latty Avenue to the West Lake Landfill, also in Bridgeton. Michael Phillis and Jim Salter, Chicago Tribune, 12 July 2023 The future may hold some clouds of barium sulfate. Caroline Delbert, Popular Mechanics, 16 Apr. 2021 And in the yellows that had browned, the team found their culprit in forcing the chromium change: barium sulfate. Andrew Moseman, Discover Magazine, 15 Feb. 2011 Radiographic examination of the stomach traditionally uses barium sulfate or Gastrografin as contrast agents. Ncbi Rofl, Discover Magazine, 12 July 2011 Back in 2021, Xiulin Ruan, a mechanical engineering professor at Purdue University, developed the world’s whitest paint using nanoparticles of barium sulfate to reflect 98.1 percent of sunlight. Tim Newcomb, Popular Mechanics, 5 Oct. 2022 The key was barium sulfate, which allowed the paint to reflect 98.1 percent of sunlight and cool surfaces by up to 19 degrees Fahrenheit compared to their surroundings. Sarah Kuta, Smithsonian Magazine, 5 Oct. 2022

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'barium sulfate.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1865, in the meaning defined above

Time Traveler
The first known use of barium sulfate was in 1865

Dictionary Entries Near barium sulfate

Cite this Entry

“Barium sulfate.” Dictionary, Merriam-Webster, Accessed 21 Apr. 2024.

Kids Definition

barium sulfate

: a colorless crystalline compound that is a sulfate of barium used especially in taking X-ray photographs of the digestive tract

Medical Definition

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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