Definition of selenium
: 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 element table
Recent Examples of selenium from the Web
Salmon is also high in protein, B vitamins, and minerals like potassium and selenium.
The next step is to turn the mustard into a super-duper selenium vacuum and magnify its absorption abilities 100-fold.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'selenium'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of selenium
New Latin, from Greek selēnē moon, from selas brightness
First Known Use: 1818See Words from the same year
SELENIUM Defined for English Language Learners
Definition of selenium for English Language Learners
: a chemical element that is used in electronic devices to make them sensitive to light
SELENIUM Defined for Kids
Definition of selenium for Students
: a gray powdery chemical element used chiefly in electronic devices
Medical Definition of selenium
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