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cal·ci·um
 calcium
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- pronunciation:
- kael
si
 m
- features:
- Word Combinations (noun), Word Explorer
| part of speech: |
noun |
| definition 1: |
a chemical element of the alkaline-earth group that has twenty protons in each nucleus and occurs widely in nature, but only in compounds such as calcite or limestone. (symbol: Ca)
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| definition 2: |
a dietary supplement containing compounds of calcium that can be absorbed in digestion.
Many women take calcium to prevent bone disease. |
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