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from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A soft, brown, amorphous or crystalline nonmetallic element, extracted chiefly from kernite and borax and used in flares, propellant mixtures, nuclear reactor control elements, abrasives, and hard metallic alloys. Atomic number 5; atomic weight 10.811; melting point 2,300°C; sublimation point 2,550°C; specific gravity (crystal) 2.34; valence 3. See Table at element.

from Wiktionary, Creative Commons Attribution/Share-Alike License

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

from the GNU version of the Collaborative International Dictionary of English

  • 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 number 5. Atomic weight 10.81. Symbol B.

from The Century Dictionary and Cyclopedia

  • n. Chemical symbol, B; atomic weight, 11. A chemical element belonging to the group of non-metals.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

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


bor(ax)1 + (carb)on.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From stem of borax + -on ("ending used to form names of substances") (Wiktionary)


  • My partner: Group 13 of the period table is called the boron group.

    Laurence Watts: You Say 'Aluminum,' I Say 'Aluminium'

  • a radioactivity characterized by the emission of positive or negative electrons in boron and magnesium, by bombardment with alpha rays.

    Irène Joliot-Curie - Nobel Lecture

  • Meantime, St. Louis-based Senoret Chemical Co. is expanding its line of Terro brand ant - and bug-bait products using a mineral containing the element boron, which is generally considered low in toxicity to humans and animals.

    Death by Mint Oil: Natural Pesticides

  • Derived from boron, which is found in rocks, soil and water.

    Natural Ingredients

  • Aside from obvious fruit vitamins like vitamin C , apple juice also contains the mineral nutrient boron, which is thought to promote healthy bones.

    Apple Juice Shown to Prevent Asthma in Children | Impact Lab

  • Aside from obvious fruit vitamins like vitamin C, apple juice also contains the mineral nutrient boron, which is thought to promote healthy bones.

    Apple Juice Shown to Prevent Asthma in Children | Impact Lab

  • Dr. Lipscomb's research involved developing X-ray diffraction techniques, usually used as a tool in physics, that allowed to him to map the connection of the atoms in an important but puzzling group of compounds called boron hydrides.

    NYT > Home Page

  • Suzuki swapped out the zinc for a boron, which is even less reactive.

    Ars Technica

  • In the current work, the researchers have found that the dopants in a silicon nanowire, namely boron and phorphorus, do not stay where they are expected, but drift to the surface of the nanowire where they become partially inactive and can no longer contribute to the electrical conductivity. - latest science and technology news stories

  • And we anticipate, it's kind of a 60% because we're one of the very few companies who make the material which is called boron nitride.



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