alkaline-earth metal

[al-kuh-lahyn-urth, -lin-]

al·ka·line-earth met·al

[al-kuh-lahyn-urth, -lin-]
noun Chemistry.
any of the group of bivalent metals including barium, radium, strontium, calcium, and, usually, magnesium, the hydroxides of which are alkalis but less soluble than those of the alkali metals.

Origin:
1900–05
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Alkaline-earth metal is always a great word to know.
So is asymmetric. 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
having an unsymmetrical arrangement of atoms in a molecule, or noting a carbon atom bonded to four different atoms or groups
American Heritage
Medical Dictionary

alkaline-earth metal n.
Any of a group of metallic elements including calcium, strontium, magnesium, barium, beryllium, and radium.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
alkaline-earth metal  
Any of a group of metallic elements that includes beryllium, magnesium, calcium, strontium, barium, and radium. Because the alkaline-earth metals have two electrons in their outer shell, they react easily with other elements and are found in nature only in compounds. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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