alkaline-earth

alkaline earth

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

Origin:
1810–20

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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

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Medical Dictionary

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

The American Heritage® Stedman's Medical Dictionary
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