Definition of boron in English:

boron

noun

mass noun
  • The chemical element of atomic number 5, a non-metallic solid.

    • ‘This product is a laundry aid containing sodium, boron, oxygen, and water.’
    • ‘These rare coloured stones are highly treasured; their coloration comes from traces of elements such as boron and nitrogen or from structural flaws in the crystal lattice.’
    • ‘The smaller element may be a nonmetallic element, such as boron, carbon, nitrogen, or silicon.’
    • ‘Diffusion methods modify the chemical composition of the surface with hardening species such as carbon, nitrogen, or boron.’
    • ‘The mineral elements most likely to be deficient in vineyards are nitrogen, potassium, phosphorus, zinc, boron, iron, manganese, and magnesium.’
    • ‘Electrons from the n-type half are drawn to the p-type half because of the way that phosphorus and boron bond with silicon.’
    • ‘They spray boron and energetic nitrogen atoms onto a clean, heated tungsten surface, held at 250 to 500 volts, in an ultrahigh vacuum.’
    • ‘Nitrogen and boron are increasingly used in steels in small but significant concentrations.’
    • ‘Zinc is in solid solution; boron, titanium and zirconium are seldom added in amounts sufficient to produce visible compounds.’
    • ‘The most widely used grain refiners are master alloys of titanium, or of titanium and boron, in aluminum.’
    • ‘Nitrogen, phosphorus, potassium, sulphur and boron have been found to be important in Zambia.’
    • ‘Each layer is doped with tiny amounts of different impurities, usually phosphorus and boron.’
    • ‘In certain cases, small metallic atoms, like boron and beryllium, may enter into restricted interstitial solid solutions.’
    • ‘Besides hydrogen and its isotope deuterium, researchers use the isotopes of boron, oxygen, nitrogen and carbon.’
    • ‘Grain refinement by titanium, boron and zirconium additions has only a limited effect on mechanical properties.’
    • ‘It was not until 1807, however, that Sir Humphrey Davy identified boron as a chemical element.’
    • ‘In addition, soy also contains magnesium and boron, which are important co-factors of calcium for bone health.’
    • ‘Those with less than an octet are often called electron deficient and are typical of certain elements with an odd number of electrons, such as boron and nitrogen.’
    • ‘Trace minerals that are already more than adequate in most diets include phosphorus, iodine, manganese, chloride, molybdenum and boron.’
    • ‘The immobile nutrients are iron, sulfur, calcium, manganese, copper, zinc, boron, molybdenum, and chlorine.’

Boron is usually prepared as an amorphous brown powder, but when very pure it forms hard, shiny, black crystals with semiconducting properties. The element has some specialized uses, such as in alloy steels and in nuclear control rods

Origin

Early 19th century: from borax, on the pattern of carbon (which it resembles in some respects).

Pronunciation

boron

/ˈbɔːrɒn/