Vitamin D Definition

noun
Any of several fat-soluble vitamins that are essential for increased absorption of calcium and phosphorus from the intestinal tract, found in fish-liver oils, milk, egg yolk, etc. or produced by irradiation of provitamins.
Webster's New World
A white crystalline compound, C28 H44 O, produced by ultraviolet irradiation of ergosterol.
American Heritage
A colorless crystalline compound, C27 H44 O, found in fish-liver oils, irradiated milk, and all irradiated animal foodstuffs. It has essentially the same biological activity as vitamin D2 .
American Heritage
Synonyms:

Vitamin D Sentence Examples

  • In its active form, vitamin D works with calcium to help control bone formation.

  • The formulation includes vitamin D to promote calcium absorption in the gut.

  • Vitamin A & Vitamin D Ointment is used as a skin protectant to help prevent and.. .

  • A deficiency of Vitamin D leads to a failure of the bones to grow and causes rickets in children and osteoporosis in adults.

  • Lack of vitamin D makes development of the bone disease osteoporosis more likely.

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