vitamin D

noun

Definition of vitamin D

: 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 \ -​ˈdē-​ˈtü How to pronounce vitamin D (audio) \ : calciferol
b or vitamin D3 \ -​ˈdē-​ˈthrē How to pronounce vitamin D (audio) \ : cholecalciferol

Examples of vitamin D in a Sentence

Recent Examples on the Web Raber also likes to recommend including dairy (whenever possible) for those important bone health nutrients, like vitamin D and calcium. Eleesha Lockett, SELF, 4 Apr. 2022 Mushrooms, on the other hand, produce vitamin D naturally and in abundance. Sara Chodosh, Popular Science, 9 Mar. 2021 That Covid tended to spread most efficiently in households among those deficient in vitamin D troubled policy-makers too little. The Editors, National Review, 14 Apr. 2022 Is vitamin D actually beneficial against infections? Zee Krstic, Good Housekeeping, 20 Feb. 2022 Daily vitamin D and fish oil supplements may help prevent some adults from developing autoimmune disorders such as arthritis and psoriasis. Alexandra Meeks, CNN, 28 Jan. 2022 Support for hockey runs strong here, even if the vitamin D does not. Dave Campbell, Anchorage Daily News, 25 Jan. 2022 This is said to mean that sunbathers can absorb the beneficial effects of vitamin D from the sun's rays, without risk of sunburn and ensuing skin damage. Perri Ormont Blumberg, Travel + Leisure, 13 Feb. 2022 Rich in vitamin D, this granola is sure to energize you through the dark, winter months. Anna Haines, Forbes, 20 Jan. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'vitamin D.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of vitamin D

circa 1921, in the meaning defined above

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Time Traveler for vitamin D

Time Traveler

The first known use of vitamin D was circa 1921

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Dictionary Entries Near vitamin D

vitamin C

vitamin D

vitamin E

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Statistics for vitamin D

Last Updated

12 May 2022

Cite this Entry

“Vitamin D.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vitamin%20D. Accessed 16 May. 2022.

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More Definitions for vitamin D

vitamin D

noun

Medical Definition of vitamin D

: 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

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