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ergo-sterol

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er⋅gos⋅ter⋅ol

[ur-gos-tuh-rohl, -rawl]
–noun Biochemistry.
a colorless, crystalline, water-insoluble sterol, C28H43OH, that occurs in ergot and yeast and that, when irradiated with ultraviolet light, is converted to vitamin D.

Origin:
1885–90; ergo- 2 + sterol
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Medical Dictionary

Main Entry: er·gos·ter·ol
Pronunciation: (")&r-'gäs-t&-"rol, -"rOl
Function: noun
: a crystalline steroid alcoholC28H44O that occurs especially in yeast, molds, and ergot and is converted by ultraviolet irradiation ultimately into vitamin D2
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

ergosterol er·gos·ter·ol (ûr-gŏs'tə-rôl', -rōl')
n.
A crystalline sterol synthesized by yeast from sugars or derived from ergot and converted to vitamin D2 when exposed to ultraviolet radiation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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