vitamin D
noun
: any or all of several fat-soluble vitamins chemically related to steroids, essential for normal bone and tooth structure, and found especially in fish-liver oils, egg yolk, and milk or produced by activation (as by ultraviolet irradiation) of sterols: such as
a
or vitamin D2
: calciferol
b
or vitamin D3
: cholecalciferol
Examples of vitamin D in a Sentence
Recent Examples on the Web
Nutrition guidelines recommend most adults consume three cups of dairy daily, which provides nutrients like calcium, vitamin D, and protein.6
How to Maintain Hydration All Day
Milk and water both provide hydration.
—
Stephanie Brown, Verywell Health, 23 July 2025
Each tablet also includes prebiotic FOS, vitamin D, zinc and biotin to keep your gut balanced and healthy.
—Angelina Villa-Clarke, Forbes.com, 21 July 2025
The doctor also suggested considering certain supplements to foster better brain health, including vitamin D, omega-3 or fish oil, or a daily multi-vitamin.
—Angelica Stabile, FOXNews.com, 16 July 2025
Research suggests that some supplements, including magnesium, vitamin D, and coenzyme Q10, and others, may help decrease the frequency or severity of migraine attack symptoms.
—Kirstyn Hill, Health, 15 July 2025
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Stephanie Brown, Verywell Health, 23 July 2025
Each tablet also includes prebiotic FOS, vitamin D, zinc and biotin to keep your gut balanced and healthy.
—Angelina Villa-Clarke, Forbes.com, 21 July 2025
The doctor also suggested considering certain supplements to foster better brain health, including vitamin D, omega-3 or fish oil, or a daily multi-vitamin.
—Angelica Stabile, FOXNews.com, 16 July 2025
Research suggests that some supplements, including magnesium, vitamin D, and coenzyme Q10, and others, may help decrease the frequency or severity of migraine attack symptoms.
—Kirstyn Hill, Health, 15 July 2025
See All Example Sentences for vitamin D
Cite this Entry
“Vitamin D.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vitamin%20D. Accessed 30 Jul. 2025.
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