Calciferol

n. vitamin D2, crystalline compound found in milk (and in liver, fish oils, etc.)

Vitamin D is a group of fat-soluble prohormones, the two major forms of which are vitamin D2 (or ergocalciferol) and vitamin D3 (or cholecalciferol). The term vitamin D also refers to metabolites and other analogues of these substances. Vitamin D3 is produced in skin exposed to sunlight, specifically ultraviolet B radiation.
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Calciferol /cal·cif·er·ol/ 1. a compound having vitamin D activity, e.g., cholecalciferol or ergocalciferol. 2. ergocalciferol. cal·cif·er·ol n. [more]Calciferol - Community and Resources

Noun
1. a fat-soluble vitamin that prevents rickets
(synonym) vitamin D, viosterol, ergocalciferol, cholecarciferol, D
(hypernym) fat-soluble vitamin
(substance-meronym) ergosterol

n. calciferol, vitamin D2, crystalline compound found in milk