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
With an adequate amount of vitamin D, good sun protection, a fewer step routine and better eating habits, the glow is continuous.
—
Samantha Mims, Essence, 3 Oct. 2025
That can include supporting your diet with nutrients like protein, iron, vitamin D, omega-3s, Bay says.
—Korin Miller, Flow Space, 1 Oct. 2025
This study suggests that vitamin D works by safeguarding those telomeres.
—Claire Bugos, Verywell Health, 1 Oct. 2025
Magnesium also helps regulate your calcium and vitamin D levels, which affects bone health.
—Kirstyn Hill, Health, 1 Oct. 2025
See All Example Sentences for vitamin D
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.
Samantha Mims, Essence, 3 Oct. 2025
That can include supporting your diet with nutrients like protein, iron, vitamin D, omega-3s, Bay says.
—Korin Miller, Flow Space, 1 Oct. 2025
This study suggests that vitamin D works by safeguarding those telomeres.
—Claire Bugos, Verywell Health, 1 Oct. 2025
Magnesium also helps regulate your calcium and vitamin D levels, which affects bone health.
—Kirstyn Hill, Health, 1 Oct. 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 5 Oct. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share