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[ur-gos-tuh-rohl, -rawl] /ɜrˈgɒs təˌroʊl, -rɔl/

noun, Biochemistry.
a colorless, crystalline, water-insoluble , C 28 H 43 OH, that occurs in ergot and yeast and that, when irradiated with ultraviolet light, is converted to vitamin D.
a plant sterol that is converted into vitamin D by the action of ultraviolet radiation. Formula: C28H43OH

ergosterol er·gos·ter·ol (ûr-gŏs’tə-rôl’, -rōl’)
A crystalline sterol synthesized by yeast from sugars or derived from ergot and converted to vitamin D2 when exposed to ultraviolet radiation.


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