Definitions for boron
ˈbɔr ɒn, ˈboʊr-boron

Princeton's WordNetRate this definition:0.0 / 0 votes

1. boron, B, atomic number 5noun

   a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder

WiktionaryRate this definition:0.0 / 0 votes

1. boronnoun

   The chemical element (symbol B) with an atomic number of 5; a metalloid

2. Etymology: From stem of borax + -on

WikipediaRate this definition:0.0 / 0 votes

1. Boron

   Boron is a chemical element with the symbol B and atomic number 5. In its crystalline form it is a brittle, dark, lustrous metalloid; in its amorphous form it is a brown powder. As the lightest element of the boron group it has three valence electrons for forming covalent bonds, resulting in many compounds such as boric acid, the mineral sodium borate, and the ultra-hard crystals of boron carbide and boron nitride. Boron is synthesized entirely by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, so it is a low-abundance element in the Solar System and in the Earth's crust. It constitutes about 0.001 percent by weight of Earth's crust. It is concentrated on Earth by the water-solubility of its more common naturally occurring compounds, the borate minerals. These are mined industrially as evaporites, such as borax and kernite. The largest known deposits are in Turkey, the largest producer of boron minerals. Elemental boron is a metalloid that is found in small amounts in meteoroids but chemically uncombined boron is not otherwise found naturally on Earth. Industrially, the very pure element is produced with difficulty because of contamination by carbon or other elements that resist removal. Several allotropes exist: amorphous boron is a brown powder; crystalline boron is silvery to black, extremely hard (about 9.5 on the Mohs scale), and a poor electrical conductor at room temperature. The primary use of the element itself is as boron filaments with applications similar to carbon fibers in some high-strength materials. Boron is primarily used in chemical compounds. About half of all production consumed globally is an additive in fiberglass for insulation and structural materials. The next leading use is in polymers and ceramics in high-strength, lightweight structural and heat-resistant materials. Borosilicate glass is desired for its greater strength and thermal shock resistance than ordinary soda lime glass. As sodium perborate, it is used as a bleach. A small amount is used as a dopant in semiconductors, and reagent intermediates in the synthesis of organic fine chemicals. A few boron-containing organic pharmaceuticals are used or are in study. Natural boron is composed of two stable isotopes, one of which (boron-10) has a number of uses as a neutron-capturing agent. The intersection of boron with biology is very small. Consensus on it as essential for mammalian life is lacking. Borates have low toxicity in mammals (similar to table salt) but are more toxic to arthropods and are occasionally used as insecticides. Boron-containing organic antibiotics are known. Although only traces are required, it is an essential plant nutrient.

Webster DictionaryRate this definition:5.0 / 2 votes

1. Boronnoun

   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

FreebaseRate this definition:0.0 / 0 votes

1. Boron

   Boron is a chemical element with symbol B and atomic number 5. Because boron is produced entirely by cosmic ray spallation and not by stellar nucleosynthesis, it is a low-abundance element in both the solar system and the Earth's crust. Boron is concentrated on Earth by the water-solubility of its more common naturally occurring compounds, the borate minerals. These are mined industrially as evaporites, such as borax and kernite. Chemically uncombined boron, which is classed as a metalloid, is not found naturally on Earth. Industrially, very pure boron is produced with difficulty, as boron tends to form refractory materials containing small amounts of carbon or other elements. Several allotropes of boron exist: amorphous boron is a brown powder and crystalline boron is black, extremely hard, and a poor conductor at room temperature. Elemental boron is used as a dopant in the semiconductor industry. The major industrial-scale uses of boron compounds are in sodium perborate bleaches, and the borax component of fiberglass insulation. Boron polymers and ceramics play specialized roles as high-strength lightweight structural and refractory materials. Boron compounds are used in silica-based glasses and ceramics to give them resistance to thermal shock. Boron-containing reagents are used as intermediates in the synthesis of organic fine chemicals. A few boron-containing organic pharmaceuticals are used, or are in study. Natural boron is composed of two stable isotopes, one of which has a number of uses as a neutron-capturing agent.

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Boron

   bō′ron, n. a simple non-metallic element present in borax and boracic acid, obtained in crystals which resemble diamonds. [See Borax.]

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Boron

   A trace element with the atomic symbol B, atomic number 5, and atomic weight 10.81. Boron-10, an isotope of boron, is used as a neutron absorber in BORON NEUTRON CAPTURE THERAPY.

Surnames Frequency by Census RecordsRate this definition:0.0 / 0 votes

1. BORON

   According to the U.S. Census Bureau, Boron is ranked #26422 in terms of the most common surnames in America.
   
   The Boron surname appeared 924 times in the 2010 census and if you were to sample 100,000 people in the United States, approximately 0 would have the surname Boron.
   
   94.9% or 877 total occurrences were White.
   1.8% or 17 total occurrences were Asian.
   1.3% or 12 total occurrences were of Hispanic origin.
   1% or 10 total occurrences were Black.
   0.8% or 8 total occurrences were of two or more races.

Anagrams for boron »

1. broon

2. Broon

How to pronounce boron?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say boron in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of boron in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of boron in Pythagorean Numerology is: 1

Examples of boron in a Sentence

1. Adam Garber:

   Young kids are known to put everything in their mouths and when it comes to slime that could have serious consequences, these high levels of boron can cause nausea, vomiting and long term reproductive health issues. Parents should closely monitor their kids when playing with this toy and call poison control if any is eaten.

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