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Medical Dictionary

cholesterol

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noun cho·les·ter·ol \kə-ˈles-tə-ˌrōl, -ˌrȯl\

Medical Definition of cholesterol

  1. :  a steroid alcohol C27H45OH that is present in animal cells and body fluids, regulates membrane fluidity, functions as a precursor molecule in various metabolic pathways, and as a constituent of LDL may cause atherosclerosis <Cholesterol is a lipid present in the cell membrane and subcellular organelles of tissues throughout the body. … In addition, cholesterol serves as the building block for all steroid hormones including cortisol, aldosterone, estrogen, and testosterone.—Sarah de Ferranti and David S. Ludwig, The New England Journal of Medicine, 25 Sept. 2008> <… the drug reduces the production of cholesterol in the liver, decreasing the amount of artery-clogging cholesterol circulating in the bloodstream.—Newsweek, 8 Dec. 1986>



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a division or portion of a pool or whole

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