Selenium

Word SELENIUM
Character 8
Hyphenation se le ni um
Pronunciations /səˈliː.ni.əm/

Definitions and meanings of "Selenium"

What do we mean by selenium?

A nonmetallic element, red in powder form, black in vitreous form, and metallic gray in stable crystalline form, resembling sulfur and found as an impurity in pyrites or obtained as a byproduct of electrolytic copper refining. It is widely used in rectifiers, as a semiconductor, and in xerography. Its photovoltaic and photoconductive actions make it useful in photocells, photographic exposure meters, and solar cells. Atomic number 34; atomic weight 78.96; melting point (gray) 221°C; boiling point (gray) 685°C; specific gravity (gray) 4.79; (vitreous) 4.28; valence 2, 4, or 6. cross-reference: Periodic Table. noun

Chemical symbol, Se; atomic weight, 79.5. A non-metallic element extracted from the pyrite of Fahlun in Sweden, and discovered in 1818 by Berzelius. noun

A nonmetallic element of the sulphur group of atomic number 34, analogous to sulphur in its compounds. It is found in small quantities with sulphur and some sulphur ores, and obtained in the free state as a dark reddish powder or crystalline mass, or as a dark metallic-looking substance. It exhibits under the action of light a remarkable variation in electric conductivity, and is used in certain electric apparatus. Symbol Se. Atomic weight 78.96. noun

A nonmetallic chemical element (symbol Se) with an atomic number of 34. noun

A toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite) noun

A nonmetallic chemical element (symbol Se) with an atomic number of 34, used mainly in glassmaking and pigments and as a semiconductor.

A single atom of this element.

Synonyms and Antonyms for Selenium

  • Synonyms for selenium
  • Selenium synonyms not found!!!
  • Antonyms for selenium
  • Selenium antonyms not found!

The word "selenium" in example sentences

As I pointed out (but which whizzed 40,000 feet over your head), selenium is also "necessary for life", but nonetheless a toxic pollutant at higher concentrations (and regulated by the EPA). ❋ Unknown (2007)

If he was just a little bit scientifically inclined, he'd also know that while selenium is an essential cofactor for enzymes necessary to life, it is nonetheless toxic pollutant at high concentrations, and subject to air pollution regulations. ❋ Unknown (2007)

Cross Reference for Selenium

  • Selenium cross reference not found!

What does selenium mean?

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