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
High in vitamin D as well as iodine and selenium which support healthy thyroid function, these fish are also rich in anti-inflammatory omega-3s.
—
Georgia Day, Vogue, 6 Sep. 2023
Nearly 42 percent of the U.S. population is deficient in vitamin D, since it's only found in sunlight and a small amount of foods.
—Paul Kita, Men's Health, 29 Aug. 2023
In the new study, vegetarians consumed less dietary protein, iron, iodine, niacin, selenium, vitamin B12, and vitamin D than other diet groups.
—Lauren Manaker Ms, Rdn, Health, 24 Aug. 2023
Since many people have low levels of vitamin D, supplementing with prenatal vitamins can help ensure adequate intake.
—Amber Smith, Discover Magazine, 15 Aug. 2023
But that doesn't mean that vitamin D isn't important for heart health.
—Good Housekeeping, 30 July 2023
But just behind vitamins and minerals such as vitamin A, vitamin C, vitamin D, calcium, iron and magnesium, exist a variety of other popular supplements known as probiotics.
—Daryl Austin, USA TODAY, 27 July 2023
Low bone density is often linked with low vitamin D levels, says Joanne Keaveney, R.D., at Boston Medical Center.
—Cori Ritchey, Men's Health, 30 Aug. 2023
In addition, calcium uptake by the body is influenced by vitamins, and especially vitamin D, so be sure your vitamin D needs are covered.
—Bryant Stamford, The Courier-Journal, 10 Aug. 2023
See More
Georgia Day, Vogue, 6 Sep. 2023
Nearly 42 percent of the U.S. population is deficient in vitamin D, since it's only found in sunlight and a small amount of foods.
—Paul Kita, Men's Health, 29 Aug. 2023
In the new study, vegetarians consumed less dietary protein, iron, iodine, niacin, selenium, vitamin B12, and vitamin D than other diet groups.
—Lauren Manaker Ms, Rdn, Health, 24 Aug. 2023
Since many people have low levels of vitamin D, supplementing with prenatal vitamins can help ensure adequate intake.
—Amber Smith, Discover Magazine, 15 Aug. 2023
But that doesn't mean that vitamin D isn't important for heart health.
—Good Housekeeping, 30 July 2023
But just behind vitamins and minerals such as vitamin A, vitamin C, vitamin D, calcium, iron and magnesium, exist a variety of other popular supplements known as probiotics.
—Daryl Austin, USA TODAY, 27 July 2023
Low bone density is often linked with low vitamin D levels, says Joanne Keaveney, R.D., at Boston Medical Center.
—Cori Ritchey, Men's Health, 30 Aug. 2023
In addition, calcium uptake by the body is influenced by vitamins, and especially vitamin D, so be sure your vitamin D needs are covered.
—Bryant Stamford, The Courier-Journal, 10 Aug. 2023
See More
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'vitamin D.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Word History
First Known Use
circa 1921, in the meaning defined above
Dictionary Entries Near vitamin D
Cite this Entry
“Vitamin D.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vitamin%20D. Accessed 26 Sep. 2023.
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Kids Definition
vitamin D
noun
: any of several vitamins that are needed for normal bone and tooth structure, and are found especially in fish-liver oils, egg yolk, and milk or are produced in response to ultraviolet light
Medical Definition
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: as
a
b
: cholecalciferol
called also sunshine vitamin
More from Merriam-Webster on vitamin D
Britannica.com: Encyclopedia article about vitamin D
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