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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
Aging, stress, and fatigue can deplete these minerals, causing them to be replaced by calcium and zinc, leading to gray or white hair.
—Daniel R. Depetris, Newsweek, 11 Jan. 2025
These include calcium, vitamins D (when fortified) and B12, niacin, phosphorus, riboflavin, pantothenic acid.
—Maxine Lipner, Verywell Health, 10 Jan. 2025
Leave the skin on when possible to retain more fiber, vitamins, and minerals, including calcium, potassium, vitamin C, and several B vitamins.
—Caroline Tien, SELF, 8 Jan. 2025
Cottage cheese with flaxseed and cinnamon: Cottage cheese is rich in protein and calcium, while flaxseed contains omega-3 fatty acids and fiber.
—Margaux Anbouba, Vogue, 8 Jan. 2025
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Word History
Etymology
New Latin, from Latin calc-, calx lime
First Known Use
1808, in the meaning defined above
Phrases Containing calcium
Dictionary Entries Near calcium
Cite this Entry
“Calcium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/calcium. Accessed 18 Jan. 2025.
Kids 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
More from Merriam-Webster on calcium
Nglish: Translation of calcium for Spanish Speakers
Britannica English: Translation of calcium for Arabic Speakers
Britannica.com: Encyclopedia article about calcium
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