Definition for "Vitamin D2"

Vitamin D2 - (Noun)

ergocalciferol or calciferol; a constituent of vitamin D.
....Source from : Wiktionary

Vitamin D2 - (General)

1. Ergocalciferol (Deltalin, Eli Lilly and Company) is a form of vitamin D, also called vitamin D2. It has the systematic name "(3β,5Z,7E,22E)-9,10-secoergosta-5,7,10(19),22-tetraen-3-ol". It is created from viosterol, which in turn is created when ultraviolet light activates ergosterol.
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2. Form of vitamin D created by plants and fungi. When ingested, the secosteroid is (sometimes) converted into 25-D. Also known as ergocholecalciferol.
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3. A plant source of Vitamin D
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....Source from : Google Definitions