cholecalciferol

noun
cho·le·cal·cif·er·ol | \ ˌkō-lə-(ˌ)kal-ˈsi-fə-ˌrȯl , -ˌrōl \

Definition of cholecalciferol 

: a sterol C27H43OH that is a natural form of vitamin D found especially in fish, egg yolks, and fish-liver oils and is formed in the skin on exposure to sunlight or ultraviolet rays

called also vitamin D3

First Known Use of cholecalciferol

1955, in the meaning defined above

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The first known use of cholecalciferol was in 1955

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cholecalciferol

noun
cho·le·cal·cif·er·ol | \ ˌkō-lə-(ˌ)kal-ˈsif-ə-ˌrȯl, -ˌrōl \

Medical Definition of cholecalciferol 

: a sterol C27H43OH that is a natural form of vitamin D found especially in fish, egg yolks, and fish-liver oils and is formed in the skin on exposure to sunlight or ultraviolet rays

called also vitamin D, vitamin D3

More from Merriam-Webster on cholecalciferol

Britannica.com: Encyclopedia article about cholecalciferol

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