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
Bottled water that’s sold as alkaline water may have added minerals like calcium and magnesium, which help the water reach an alkaline pH, according to Mayo Clinic.
—
Angelica Stabile, FOXNews.com, 6 June 2026
Greek Yogurt Fuel up on protein, calcium, and probiotics with Greek yogurt.
—Kirsten Nunez, Martha Stewart, 5 June 2026
Beyond diet, weight-bearing exercise, adequate calcium and vitamin D intake, and limiting alcohol are all backed by current evidence for maintaining bone density.
—Allison Palmer
june 4, Miami Herald, 4 June 2026
However, some women may fall short of certain nutrients, such as iron, calcium, and folate, which can affect overall health and lead to complications.
—Angela Ryan Lee, Verywell Health, 4 June 2026
See All Example Sentences for calcium
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Angelica Stabile, FOXNews.com, 6 June 2026
Greek Yogurt Fuel up on protein, calcium, and probiotics with Greek yogurt.
—Kirsten Nunez, Martha Stewart, 5 June 2026
Beyond diet, weight-bearing exercise, adequate calcium and vitamin D intake, and limiting alcohol are all backed by current evidence for maintaining bone density.
—Allison Palmer
june 4, Miami Herald, 4 June 2026
However, some women may fall short of certain nutrients, such as iron, calcium, and folate, which can affect overall health and lead to complications.
—Angela Ryan Lee, Verywell Health, 4 June 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 12 Jun. 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
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