selenium

noun

se·​le·​ni·​um sə-ˈlē-nē-əm How to pronounce selenium (audio)
: a photosensitive element that occurs in both crystalline and amorphous forms, is obtained chiefly as a by-product in copper refining, and is used especially in glass, semiconductor devices, and alloys see Chemical Elements Table

Examples of selenium in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Cottage cheese is also high in nutrients like vitamin B12, zinc, calcium, and selenium. Jillian Kubala, Health, 4 Feb. 2025 Companies that once minted money selling baby formula to feed a baby boom are now making shakes with calcium and selenium for older adults with brittle bones. Alexandra Stevenson, New York Times, 17 Jan. 2025 Furthermore, selenium supplements can interfere with other medications, and too much of the mineral is linked to health risks. Melissa Dahl, NBC News, 22 Nov. 2024 Nutrition varies depending on ingredients used, but most sourdough provides a good source of several vitamins and minerals, including B vitamins and selenium. Jillian Kubala, Health, 28 Jan. 2025 See all Example Sentences for selenium 

Word History

Etymology

New Latin, from Greek selēnē moon, from selas brightness

First Known Use

1818, in the meaning defined above

Time Traveler
The first known use of selenium was in 1818

Dictionary Entries Near selenium

Cite this Entry

“Selenium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/selenium. Accessed 17 Feb. 2025.

Kids Definition

selenium

noun
se·​le·​ni·​um sə-ˈlē-nē-əm How to pronounce selenium (audio)
: an element that is sensitive to light and is used especially in glass, alloys, and electronic devices see element

Medical Definition

selenium

noun
se·​le·​ni·​um sə-ˈlē-nē-əm How to pronounce selenium (audio)
: a nonmetallic photosensitive element that occurs in both crystalline and amorphous forms, is an essential trace element found especially in grains and meat, and is used chiefly in glass, semiconductor devices, and alloys
symbol Se
see Chemical Elements Table, selenosis

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