alkaline earth

alkaline earth

noun Chemistry.
any of the oxides of barium, radium, strontium, calcium, and, sometimes, magnesium.

Origin:
1810–20
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Alkaline earth is always a great word to know.
So is silicone. Does it mean:
any of a number of polymers containing alternate silicon and oxygen atoms and that are fluid, resinous, rubbery, extremely stable in high temperatures, and water-repellent
a chemical that consumes or renders inactive the impurities in a mixture
Collins
World English Dictionary
alkaline earth
 
n
1.  alkaline earth metal, Also called: alkaline earth element any of the divalent electropositive metals beryllium, magnesium, calcium, strontium, barium, and radium, belonging to group 2A of the periodic table
2.  an oxide of one of the alkaline earth metals

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

alkaline earth n.
The oxides of calcium, strontium, radium, and barium, and sometimes magnesium.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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