- The chemical element of atomic number 5, a nonmetallic solid. (Symbol: B)
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 nuclear control rodsMore example sentences
- The mineral elements most likely to be deficient in vineyards are nitrogen, potassium, phosphorus, zinc, boron, iron, manganese, and magnesium.
- The smaller element may be a nonmetallic element, such as boron, carbon, nitrogen, or silicon.
- Zinc is in solid solution; boron, titanium and zirconium are seldom added in amounts sufficient to produce visible compounds.
- More example sentences
- Some clues can be found in erbium rhodium boride and holmium molybdenum sulphide—the superconductivity of both these materials is destroyed by the onset of a first-order ferromagnetic phase transition.
- Either calcium boride or lithium should be plunged into the molten bath to deoxidize the melt.
- Possible ceramics for such armours are: Boron carbide, Silicon carbide, Aluminium oxide, or Titanium boride.
early 19th century: from borax, on the pattern of carbon (which it resembles in some respects).
More definitions of boronDefinition of boron in:
- The British & World English dictionary