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

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

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

Time Traveler
The first known use of vitamin D was circa 1921

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.

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
b
: cholecalciferol

called also sunshine vitamin

More from Merriam-Webster on vitamin D

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