oxford views updated May 14 2018
cal·cif·er·ol / kalˈsifəˌrôl; -ˌrōl/ •
n. Biochem. one of the D vitamins, a sterol that is formed when its isomer ergosterol is exposed to ultraviolet light, and that is routinely added to dairy products. Also called ergocalciferol, vitamin D2 (see vitamin D).
oxford views updated Jun 08 2018
Used at one time as a name for ercalciol (ergocalciferol or vitamin D2
), made by the ultra‐violet irradiation of ergosterol. Also used as a general term to include both vitamers
of vitamin D
oxford views updated Jun 11 2018
A compound, designated vitamin D2
, obtained through the ultraviolet irradiation of ergosterol.