boron

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 in nuclear control rods

派生
boride
noun
语源

early 19th cent.: from borax,on the pattern of carbon (which resembles in some respects)