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
Make sure to pick one that has calcium and vitamin D, which may help improve your sleep.
—
Lauren O'Connor, Health, 14 July 2025
There are plenty of reasons to pick up gardening as a hobby, from connecting with nature and soaking up vitamin D to reducing stress and improving cardiovascular health (weeding is no joke).
—Mariana Best, Better Homes & Gardens, 10 July 2025
Calcium and vitamin D are known for supporting bone health, while selenium can support your thyroid and immune function.
—Audrey Noble, Vogue, 2 July 2025
Blood tests every 6–12 months can help track levels of B12, iron, and vitamin D, as well as trace minerals, which can help guide specific supplementation.
—Jesse Pines, Forbes.com, 16 June 2025
See All Example Sentences for vitamin D
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Lauren O'Connor, Health, 14 July 2025
There are plenty of reasons to pick up gardening as a hobby, from connecting with nature and soaking up vitamin D to reducing stress and improving cardiovascular health (weeding is no joke).
—Mariana Best, Better Homes & Gardens, 10 July 2025
Calcium and vitamin D are known for supporting bone health, while selenium can support your thyroid and immune function.
—Audrey Noble, Vogue, 2 July 2025
Blood tests every 6–12 months can help track levels of B12, iron, and vitamin D, as well as trace minerals, which can help guide specific supplementation.
—Jesse Pines, Forbes.com, 16 June 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 18 Jul. 2025.
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