vitamin d2

noun

1. calciferol.

noun

1. another name for calciferol

n.

1. A white crystalline compound produced by ultraviolet irradiation of ergosterol.calciferol ergocalciferol

1. A white crystalline sterol produced by ultraviolet irradiation of ergosterol and also occurring naturally in fungi and some fish oils. Vitamin D2 is the form of vitamin D generally used as a dietary supplement. Also called calciferol, ergocalciferol. Chemical formula: C28H44O.