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vitamin D
noun
- any of the several fat-soluble, antirachitic vitamins D 1 , D 2 , D 3 , occurring in milk and fish-liver oils, especially cod and halibut, or obtained by irradiating provitamin D with ultraviolet light, essential for the formation of normal bones and teeth.
vitamin D
noun
- any of the fat-soluble vitamins, including calciferol and cholecalciferol, occurring in fish-liver oils (esp cod-liver oil), milk, butter, and eggs: used in the treatment of rickets and osteomalacia
vitamin D
- Any of a group of fat-soluble sterols necessary for normal bone growth, especially vitamin D 2 ( ergocalciferol ) and vitamin D 3 ( cholecalciferol ). Vitamin D is found in milk, fish, and eggs and can be produced in the skin on exposure to sunlight. A deficiency of vitamin D in the diet causes rickets in children.
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Word History and Origins
Origin of vitamin D1
First recorded in 1920–25
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Example Sentences
I take calcium and vitamin D supplements, but prescription medications are generally only for women in menopause.
From The Daily Beast
The irony in it all is that our bodies need, if not crave, Vitamin D—and more than a chewable tablet.
From The Daily Beast
Spring is starting to arrive, and we plan to soak up as much sun as our vitamin-D-deficient bodies can handle.
From The Daily Beast
Vitamin D3—Most of you reading this are probably vitamin D deficient if you wear clothes and work indoors.
From The Daily Beast
One more thing, take it in the morning otherwise it can disrupt your sleep since vitamin D and melatonin are inversely related.
From The Daily Beast
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