calcium
US /ˈkæl.si.əm/
UK /ˈkæl.si.əm/
1.
calcium
the chemical element of atomic number 20, a soft silvery-white reactive metal occurring in limestone, marble, and gypsum. It is an essential constituent of bone, teeth, and shells and is a vital dietary constituent.
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Milk is a good source of calcium.
Melk is een goede bron van calcium.
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Our bones need enough calcium to stay strong.
Onze botten hebben voldoende calcium nodig om sterk te blijven.