any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter

a chemical element with properties in between, or that are a mixture of, those of metals and nonmetals.

any chemical element that belongs to the boron group.

of or relating to boron

of or relating to or derived from or containing boron

of or relating to or derived from or containing boron

an ore of boron consisting of hydrated sodium borate; used as a flux or cleansing agent

a light soft mineral consisting of hydrated sodium borate in crystalline form; an important source of boron

any binary compound of boron and hydrogen.

of or relating to boron

of or relating to or derived from or containing boron

an ore of boron consisting of hydrated sodium borate; used as a flux or cleansing agent

a light soft mineral consisting of hydrated sodium borate in crystalline form; an important source of boron

an extremely hard boron–carbon ceramic material used in tank armor, bulletproof vests, engine sabotage powders, as well as numerous industrial applications.

an inorganic compound with the chemical formula (BH)3(NH)3.

a chemical compound between boron and a less electronegative element.