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
Origin of boronfrom earlier boracium ( from borax) + -on, as in (carb)on: so named by Sir Humphry Davy, who isolated it (1808)
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.
Origin of boronbor(ax) 1 (carb)on
(usually uncountable, plural borons)
From stem of borax + -on (“ending used to form names of substances”)