cholecalciferol

1. Cholecalciferol is produced by irradiation of 7-dehydrocholesterol with ultraviolet light either from the sun or from an artificial source.
   胆钙化醇是7？脱氢胆固醇经日光或人工来源的紫外线照射而产生的。
2. In their study, the researchers tested vitamin D3, or cholecalciferol, the kind humans make when they are exposed to sunlight.
   在他们的研究中，研究人员检测了维生素D3，或称为胆钙化醇的变化，后者是人们在暴露于日光下时维生素D3的一种形式。

noun

1. a fat-soluble vitamin that prevents rickets

   Synonym:    vitamin DcalciferolviosterolergocalciferolD