calcium
noun
cal·ci·um
ˈkal-sē-əm 
often attributive
: a metallic chemical element of the alkaline-earth group that occurs naturally only in combination and is essential to cellular functions in all known organisms see Chemical Elements Table
Examples of calcium in a Sentence
Her doctor said she should eat more foods that are high in calcium, such as milk and cheese.
Recent Examples on the Web
The yogurt provides calcium, protein, B12, potassium, and probiotics.
—
Jennifer Berger, Verywell Health, 18 May 2026
The balloon emits electrical shocks that help break up the calcium and allow the stent to open wider.
—Kerry Breen, CBS News, 16 May 2026
Basalt contains a mix of minerals that include calcium, aluminum, iron, magnesium, sodium, silicon, and oxygen.
—Scott K. Johnson, ArsTechnica, 15 May 2026
According to the team, basalt naturally contains iron and aluminum alongside calcium.
—Neetika Walter, Interesting Engineering, 14 May 2026
See All Example Sentences for calcium
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Jennifer Berger, Verywell Health, 18 May 2026
The balloon emits electrical shocks that help break up the calcium and allow the stent to open wider.
—Kerry Breen, CBS News, 16 May 2026
Basalt contains a mix of minerals that include calcium, aluminum, iron, magnesium, sodium, silicon, and oxygen.
—Scott K. Johnson, ArsTechnica, 15 May 2026
According to the team, basalt naturally contains iron and aluminum alongside calcium.
—Neetika Walter, Interesting Engineering, 14 May 2026
See All Example Sentences for calcium
Cite this Entry
“Calcium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/calcium. Accessed 21 May. 2026.
Copy CitationKids Definition
calcium
noun
cal·ci·um
ˈkal-sē-əm
: a silver-white soft metallic element that is found only in combination with other elements (as in limestone) and is one of the necessary elements making up the bodies of most plants and animals see element
Medical Definition
calcium
noun
cal·ci·um
ˈkal-sē-əm
often attributive
: a silver-white bivalent metallic element that is an alkaline earth metal, occurs only in combination, and is an essential constituent of most plants and animals
—symbol Ca
see Chemical Elements Table
Love words? Need even more definitions?
Merriam-Webster unabridged
