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stigmasterol

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stig⋅mas⋅ter⋅ol

[stig-mas-tuh-rawl, -rohl]
–noun Biochemistry.
a crystalline, water-insoluble steroid, C2 9H4 8O, present in soybeans or calabar beans, used chiefly as a raw material in the manufacture of progesterone.

Origin:
1920–25; < NL (Physo)stigma (see physostigmine ) + sterol
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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stig·mas·ter·ol   (stĭg-mās'tə-rôl', -rōl')   
n.  A sterol, C29H48O, obtained from soybeans or Calabar beans.

[New Latin (Phȳso)stigma, Calabar bean genus; see physostigmine + sterol.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: stig·mas·ter·ol
Pronunciation: stig-'mas-t&-"rol, -"rOl
Function: noun
: a crystalline sterolC29H48O obtained especially from the oils of Calabar beans and soybeans
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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