Definition of selenium in English:



  • [mass noun] The chemical element of atomic number 34, a grey crystalline non-metal with semiconducting properties.

    • ‘Many studies have shown that supplemental selenium has cancer-preventive properties.’
    • ‘Severely malnourished children are often deficient in vitamin A, zinc, iron, folic acid, copper, and selenium.’
    • ‘Most farmers are adding selenium, copper, zinc and iodine to their water supply.’
    • ‘Duration of clinical mastitis was reduced in the cows supplemented with both vitamin E and selenium.’
    • ‘Meat is also a decent source of nutrients such as vitamin A, vitamin B12, folate, selenium and zinc.’
    • ‘Vegan diets can be low in iodine and selenium, but this depends on the soil in which the plants are grown.’
    • ‘The organic form of selenium has been found to be more effective than sodium selenite for reproducing animals.’
    • ‘Zinc and selenium are essential elements that are used by enzymes in your body.’
    • ‘Vitamin C does not work on its own - it needs vitamin E, selenium, and many other micronutrients all working together.’
    • ‘While writing this story she added selenium and chromium to her supplement regimen.’
    • ‘Many species of plants have the ability to absorb metals such as zinc, selenium and nickel from the soil and to concentrate them in their tissues.’
    • ‘There is no homeostatic control mechanism for selenium absorption and selenium is highly absorbable.’
    • ‘Glutathione peroxidase is an antioxidant enzyme containing both selenium and glutathione.’
    • ‘Recently, selenium and tellurium have been added as important impurities.’
    • ‘In an associated consideration, mercury in the body tends to quell or cripple selenium in enzymes.’
    • ‘Sesame and sunflower seeds are rich in selenium, vitamin E, calcium and zinc.’
    • ‘The Pasminco operation produces lead, zinc, cadmium, selenium, copper sulphate and sulphuric acid.’
    • ‘Lead, selenium, tellurium and sulfur are added to copper alloys to improve machinability.’
    • ‘Colloidal elemental selenium and metal selenides are not available to plants.’
    • ‘The most common trace element deficiencies in cattle are copper, selenium, iodine and cobalt.’


Early 19th century: modern Latin, from Greek selēnē moon.