vitamin D

4 ENTRIES FOUND:

vitamin D

noun

Definition of VITAMIN D

: 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 : calciferol b : cholecalciferol—called also sunshine vitamin

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