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selenium
noun
se·le·ni·um
sə-ˈlē-nē-əm
: 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
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
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Word History
Etymology
New Latin, from Greek selēnē moon, from selas brightness
First Known Use
1818, in the meaning defined above
Phrases Containing selenium
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
: 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
: 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
More from Merriam-Webster on selenium
Nglish: Translation of selenium for Spanish Speakers
Britannica.com: Encyclopedia article about selenium
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