Dictionary
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 or vitamin D2 \-ˈdē-ˈtü\ : calciferol b or vitamin D3 \-ˈdē-ˈthrē\ : cholecalciferol
See vitamin D defined for kids ADVERTISEMENT
First Known Use of VITAMIN D
circa 1921
Medical Dictionary
vitamin D
noun
Medical 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
Learn More About VITAMIN D
Browse
ADVERTISEMENT
Seen & Heard
What made you want to look up vitamin D? Please tell us where you read or heard it (including the quote, if possible).