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 \ : calciferol
b or vitamin D3 \ -​ˈdē-​ˈthrē \ : cholecalciferol

Examples of vitamin D in a Sentence

Recent Examples on the Web

People need cholesterol to make hormones, vitamin D and other substances, but trouble arises when the waxy matter builds up inside the walls of arteries, hardening into plaque that restricts the flow of blood and increases the risk of heart disease. Jo Craven Mcginty, WSJ, "High Cholesterol? It Must Be January," 18 Jan. 2019 An example of an immunoassay would be a vitamin D test or a PSA test, which is the prostate cancer test, essentially. Recode Staff, Recode, "Full transcript: WSJ investigative journalist John Carreyrou on Recode Decode," 3 June 2018 Many consumers don’t have a problem with eating fish, which gets rave reviews from doctors and nutritionists for being relatively low in fat while loaded with nutrients, including vitamin D and omega-3 fatty acids. Anne Marie Chaker, WSJ, "Fish: The Final Frontier in Fake Meat," 15 Oct. 2018 Being in the sun also prompts your body to make more vitamin D, so that’s yet another process adding to its workload. Nina Bahadur, SELF, "Why Does Spending Time in the Sun Make You So Tired?," 8 Sep. 2018 To help with calcium absorption, prenatal vitamins may also have some vitamin D, which may be hard to get enough of during the day depending on your diet and sun exposure. Cassie Shortsleeve, SELF, "Do I Really Need to Take Prenatal Vitamins Before I’m Even Pregnant?," 19 Apr. 2018 Also, American food is highly fortified with vitamin D in milk, iodine in salt, B vitamins in flour, even calcium in some brands of orange juice. Liz Szabo, chicagotribune.com, "Older Americans are hooked on vitamins despite scarce evidence they work," 6 Apr. 2018 Also, American food is highly fortified — with vitamin D in milk, iodine in salt, B vitamins in flour, even calcium in some brands of orange juice. Liz Szabo, USA TODAY, "Are you over 65 and take vitamins? They don't usually help — and sometimes they harm," 4 Apr. 2018 Also, American food is highly fortified — with vitamin D in milk, iodine in salt, B vitamins in flour, even calcium in some brands of orange juice. Liz Szabo, Washington Post, "Older Americans Are Hooked On Vitamins Despite Scarce Evidence They Work," 4 Apr. 2018

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.

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First Known Use of vitamin D

circa 1921, in the meaning defined above

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Statistics for vitamin D

Last Updated

24 Jan 2019

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Time Traveler for vitamin D

The first known use of vitamin D was circa 1921

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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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