vitamin D
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: such asa or vitamin D2 play \-ˈdē-ˈtü\ : calciferolb or vitamin D3 play \-ˈdē-ˈthrē\ : cholecalciferol
From the M-W Editors
Circa 1921
First Known Use of vitamin d
circa 1921
Medical Dictionary
vitamin D
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: asa: calciferolb: cholecalciferol—called also sunshine vitamin
Learn More about vitamin d
-
Britannica.com: Encyclopedia article about vitamin D
Seen and Heard
What made you want to look up vitamin D? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!