boron

Definition of Boron in English :

see synonyms of boron

Noun

1. atomic number 5, b, boron

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

WordNet Lexical Database for English. Princeton University. 2010.

Boron

see synonyms of boron

noun

a very hard almost colourless crystalline metalloid element that in impure form exists as a brown amorphous powder. It occurs principally in borax and is used in hardening steel. The naturally occurring isotope boron-10 is used in nuclear control rods and neutron detection instruments. Symbol: B; atomic no: 5; atomic wt: 10.81; valency: 3; relative density: 2.34 (crystalline), 2.37 (amorphous); melting pt: 2092°C; boiling pt: 4002°C

Boron

see synonyms of boron

noun

a nonmetallic chemical element occurring only in combination, as with sodium and oxygen in borax, and produced in the form of either a brown amorphous powder or very hard, brilliant crystals: its compounds are used in the preparation of boric acid, water softeners, soaps, enamels, glass, pottery, etc.: symbol, B; at. no., 5

see the periodic table of elements in the Reference Supplement

Boron

see synonyms of boron

n. Symbol B

A nonmetallic element that is amorphous and brown or crystalline and black, and is 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 2,075°C; boiling point 4000°C; specific gravity (crystal) 2.34, (amorphous) 2.37; valence 3. See Periodic Table.

Boron

Noun

Boron

Boron

Boron

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