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 Mushrooms are also one of the few natural food sources of vitamin D, and contain beta-glucan, a type of soluble fiber that aids in the reduction of blood cholesterol levels. Daphne Ewing-Chow, Forbes, 14 Feb. 2024 So the findings might not apply to adults with vitamin D deficiency or osteoporosis, Herries pointed out. Sandra Gordon, Health, 9 Feb. 2024 Not only are our collective vitamin D levels also notoriously low—the USDA estimates that 90 percent of Americans do not consume enough—the vitamin also helps aids our bodies in calcium absorption. Calin Van Paris, Vogue, 26 Dec. 2023 The body also naturally produces vitamin D through sun exposure. Alexa Mikhail, Fortune Well, 25 Dec. 2023 Of course, vitamin D is also available in supplement form for those who may be deficient. Discover Magazine, 29 Feb. 2024 President Biden Has Begun Using a CPAP Machine for Sleep Apnea His lab work — which entailed a comprehensive metabolic panel (CMP), urinalysis, complete blood count (CBC) and level checks of vitamin D, homocysteine, magnesium, folate and creatine kinase — returned normal. Kyler Alvord, Peoplemag, 28 Feb. 2024 This is due to the body’s ability to store vitamin D during the sunnier months–vitamin D stores that reduce over the winter can be replenished in the spring. Philipp Wehsack, Vogue, 28 Feb. 2024 Other research has shown that vitamin D supplements might not have many benefits. Ashley Abramson, Health, 14 Jan. 2024

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 28 Mar. 2024.

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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