Origin of boron
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for boron
We tried silicon and boron, and a lot of things that I have forgotten now.Historic Inventions
Rupert S. Holland
His results indicated that fruits are relatively rich in boron.
Tobacco is so rich in boron that it can be detected in the ash of one cigarette.
With an unstable fuel like boron hydride, that made the difference.The Scarlet Lake Mystery
Harold Leland Goodwin
Recent developments indicate that the metal, boron, may play an important part in the metallurgy of various metals.The Economic Aspect of Geology
C. K. Leith
- 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
C19: from bor (ax) + (carb) on
Word Origin and History for boron
Online Etymology Dictionary, © 2010 Douglas Harper
- A soft, nonmetallic element found in compounds that are used in treating cancer and as astringents and antiseptics. Atomic number 5.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- A shiny, brittle, black metalloid element extracted chiefly from borax. It is a good electrical conductor at high temperatures and a poor conductor at low temperatures. Boron is necessary for the growth of land plants and is used in the preparation of soaps, abrasives, and hard alloys. It is also used in the control rods of nuclear reactors as a neutron absorber. 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 Periodic Table.
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