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alkaline earth

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

First recorded in 1810–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use alkaline earth in a sentence

British Dictionary definitions for alkaline earth

alkaline earth

noun
Also called: alkaline earth metal, alkaline earth element any of the divalent electropositive metals beryllium, magnesium, calcium, strontium, barium, and radium, belonging to group 2A of the periodic table
an oxide of one of the alkaline earth metals
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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