n.
Pronunciation: kal- ' si-f ə - ˌ ro ̇ l, - ˌ r ō l
Function: noun
Etymology: calcif erous + ergost erol
Date: 1931
: an alcohol C 28 H 43 OH usually prepared by irradiation of ergosterol and used as a dietary supplement in nutrition and medicinally in the control of rickets and related disorders ― called also vitamin D 2