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.
Chia Pudding Chia seeds are high in fiber, healthy fats, and minerals like calcium, zinc, selenium, and magnesium. Jillian Kubala, Health, 31 Mar. 2025 Over-supplementation of selenium, vitamin A, and vitamin have been linked to hair loss.3 3. Patty Weasler, Rn, Verywell Health, 28 Mar. 2025 These fish have nutrients, such as omega-3 fatty acids, protein, selenium, vitamin D3, and B vitamins, which may help promote strong and healthy hair growth.3 Omega-3s are thought to have anti-inflammatory properties and protect hair follicles from damage. Julie Marks, Verywell Health, 20 Mar. 2025 Sardines These small fish, especially when eaten whole, are a powerhouse of nutrients: Sardines contain vitamin D, selenium, and vitamin B12. Alessandra Signorelli, Vogue, 11 Mar. 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

Browse Nearby Words

Cite this Entry

“Selenium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/selenium. Accessed 5 Apr. 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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