viosterol

vi·os·ter·ol  (v-st-rôl, -rl)

n.

Ergosterol activated by ultraviolet irradiation; vitamin D₂.

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[(ultra)vio(let) + (ergo)sterol.]

Thesaurus

Noun

1.

viosterol - a fat-soluble vitamin that prevents rickets calciferol, cholecalciferol, D, ergocalciferol, vitamin D ergosterol - a plant sterol that is converted into vitamin D by ultraviolet radiation fat-soluble vitamin - any vitamin that is soluble in fats