vitamin D
noun Date: circa 1921 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 a. (or vitamin D2) calciferol b. (or vitamin D3) cholecalciferol

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • Vitamin D — is a group of fat soluble prohormones, the two major forms of which are vitamin D2 (or ergocalciferol) and vitamin D3 (or cholecalciferol).cite web|url=http://dietary supplements.info.nih.gov/factsheets/vitamind.asp|title=Dietary Supplement Fact… …   Wikipedia

  • vitamin D — n. 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; specif., a) vitamin… …   English World dictionary

  • vitamin D — n. any of several chemically related fat soluble vitamins that prevent rickets. It is found in fish liver oils, egg yolks and milk. Component vitamin D2 is also called {calciferol}, and vitamin D3 is called {cholecalciferol}. Syn: calciferol,… …   The Collaborative International Dictionary of English

  • vitamin D — ► NOUN ▪ any of a group of compounds found in liver and fish oils, essential for the absorption of calcium and including calciferol (vitamin D2) and cholecalciferol (vitamin D3) …   English terms dictionary

  • vitamin D — vitamin D. См. витамин D. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • vitamin D — vitamin D. = calciferol (см.). (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Vitamin D — ⇒ Calciferol …   Deutsch wörterbuch der biologie

  • Vitamin-D — Strukturformel Allgemeines Trivialname Vitamin D3 Andere Namen Cholecalciferol …   Deutsch Wikipedia

  • Vitamin D — Strukturformel Allgemeines Trivialname Vitamin D3 Andere Namen Cholecalciferol …   Deutsch Wikipedia

  • vitamin D — any of the several fat soluble, antirachitic vitamins D1, D2, D3, occurring in milk and fish liver oils, esp. cod and halibut, or obtained by irradiating provitamin D with ultraviolet light, essential for the formation of normal bones and teeth.… …   Universalium

  • Vitamin D — A steroid vitamin which promotes the intestinal absorption and metabolism of calcium and phosphorus. Under normal conditions of sunlight exposure, no dietary supplementation is necessary because sunlight promotes adequate vitamin D synthesis in… …   Medical dictionary

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