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单词 alkaline earth
释义

WordReference Random House Unabridged Dictionary of American English © 2024
alkaline earth, [Chem.]
  1. Chemistryany of the oxides of barium, radium, strontium, calcium, and, sometimes, magnesium.
  • 1810–20

Collins Concise English Dictionary © HarperCollins Publishers::
alkaline earth n
  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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