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.

vitamin D1,

a mixture of lumisterol and calciferol, obtained by ultraviolet irradiation of ergosterol.

vitamin D2,


vitamin D3,

a D vitamin, C27H43OH, occurring in fish-liver oils, that differs from vitamin D2 by slight structural differences in the molecule. Also called cholecalciferol.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

vitamin B complexvitamin E
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