• synonyms

alkaline earth

noun Chemistry.
  1. 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. 2018

Examples from the Web for alkaline earth

Historical Examples

  • What properties have the alkaline-earth metals in common with the alkali metals?

    An Elementary Study of Chemistry

    William McPherson

  • Like the alkaline-earth metals, their carbonates and phosphates are insoluble in water.

  • The alkaline-earth family consists of the very abundant element calcium and the much rarer elements strontium and barium.

  • They are called the alkaline-earth metals because their properties are between those of the alkali metals and the earth metals.

  • Unlike both the alkali and alkaline-earth metals, their hydroxides are nearly insoluble in water.

British Dictionary definitions for alkaline earth

alkaline earth

  1. 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
  2. an oxide of one of the alkaline earth metals
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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

alkaline earth in Medicine

alkaline earth

  1. The oxides of calcium, strontium, radium, and barium, and sometimes magnesium.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.