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

Garlic Garlic is an excellent source of vitamin C, manganese, vitamin B6, selenium, and fiber. —Julie Marks, Verywell Health, 10 Oct. 2024

May Support Immune Health Pumpkin is a natural source of many immune health-supporting nutrients, including vitamin C, zinc, and selenium. —Lauren Manaker Ms, Rdn, Health, 2 Oct. 2024

To that end, the doctor recommends eating foods that are rich in iron, omega-3 fatty acids, zinc, biotin, selenium and vitamin B5 for healthy hair growth. —Philipp Wehsack, Vogue, 20 Sep. 2024

Brain Health Bacon is a rich selenium source, vital for brain health. —Elizabeth Barnes, Verywell Health, 19 Sep. 2024

Word History

Etymology

New Latin, from Greek selēnē moon, from selas brightness

First Known Use

1818, in the meaning defined above

Phrases Containing selenium

• selenium cell

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