boron
/ˈbɔːrɒn/noun
mass noun
- the chemical element of atomic number 5, a non-metallic solid (Symbol: B)（化学元素）硼（符号：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 rods.
派生词
boride
noun词源
early 19th cent.: from BORAX, on the pattern of carbon (which resembles in some respects).