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 (vī-ŏs′tə-rôl′, -rōl′)
A preparation of vitamin D2 obtained from ultraviolet irradiation of ergosterol, formerly used medicinally.

[(ultra)vio(let) + (ergo)sterol.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Pharmacology) vitamin D2, a fat soluble vitamin activated by ultraviolet radiation and which prevents rickets
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.viosterol - a fat-soluble vitamin that prevents ricketsviosterol - a fat-soluble vitamin that prevents rickets
ergosterol - a plant sterol that is converted into vitamin D by ultraviolet radiation
fat-soluble vitamin - any vitamin that is soluble in fats
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Effect on monkeys of small doses of concentrated preparation of viosterol. Arch Pathol.