Meaning of vitamin D
- any of the several fat-soluble, antirachitic vitamins D, D, D, 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.
- a mixture of lumisterol and calciferol, obtained by ultraviolet irradiation of ergosterol.
- a D vitamin, CHOH, occurring in fish-liver oils, that differs from vitamin D by slight structural differences in the molecule. Also called