| 释义 |
vitamin Dn.（名词）- A fat-soluble vitamin occurring in several forms, especially vitamin D2 or vitamin D 3, required for normal growth of teeth and bones, and produced in general by ultraviolet irradiation of sterols found in milk, fish, and eggs. 维生素D：以多种形式存在的一种脂溶性维生素，包括维生素D2或维生素D 3，为牙齿和骨骼生长所必需，一般通过对牛奶、鱼和蛋中的固醇进行紫外线照射获得
vitamin D2n.（名词）- A white crystalline compound, C28H 44O, produced by ultraviolet irradiation of ergosterol. Also called calciferol ,ergocalciferol 维生素D2：一种白色晶体化合物，C28H 44O，通过紫外线照射麦角固醇获得 也作 calciferol,ergocalciferol
vitamin D3n.（名词）- A colorless crystalline compound, C27H 44O, found in fish-liver oils, irradiated milk, and all irradiated animal foodstuffs. It has essentially the same biological activity as vitamin D 2. Also called cholecalciferol 维生素D3：一种晶状无色化合物，C27H 44O，存在于鱼肝油、紫外线照射过的牛奶和所有经照射的动物饲料中。基本上与维生素D 2的活性相同 也作 cholecalciferol
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