Boron
['bɔːrɒn] or ['borɑn]
Definition
(noun.) a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder.
Checked by Joseph--From WordNet
Definition
(n.) A nonmetallic element occurring abundantly in borax. It is reduced with difficulty to the free state, when it can be obtained in several different forms; viz., as a substance of a deep olive color, in a semimetallic form, and in colorless quadratic crystals similar to the diamond in hardness and other properties. It occurs in nature also in boracite, datolite, tourmaline, and some other minerals. Atomic weight 10.9. Symbol B.
Typist: Rowland
Definition
n. a simple non-metallic element present in borax and boracic acid obtained in crystals which resemble diamonds.
Inputed by Erma
Examples
- We tried silicon and boron, and a lot of things that I have forgotten now. Rupert S. Holland. Historic Inventions.
- Discovery of Potassium, Sodium and Boron by Davy. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
- He now turned to the use of almost infusible metals--such as boron, ruthenium, chromium, etc. Frank Lewis Dyer. Edison, His Life and Inventions.
- A great variety of methods for coating incandescent lamp filaments with silicon, titanium, chromium, osmium, boron, etc. Frank Lewis Dyer. Edison, His Life and Inventions.
Inputed by Brenda