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[lip-id, lahy-pid] /ˈlɪp ɪd, ˈlaɪ pɪd/
noun, Biochemistry
any of a group of organic compounds that are greasy to the touch, insoluble in water, and soluble in alcohol and ether: lipids comprise the fats and other esters with analogous properties and constitute, with proteins and carbohydrates, the chief structural components of living cells.
Also, lipide
[lip-ahyd, -id, lahy-pahyd, -pid] /ˈlɪp aɪd, -ɪd, ˈlaɪ paɪd, -pɪd/ (Show IPA)
Origin of lipid
1920-25; lip- + -id3 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for lipids
  • Xanthomas are common, particularly among older adults and people with high blood lipids.
  • The animals were first given an unbalanced diet, skewed in favor of either lipids or protein.
  • When the ultrasound is removed, the lipids quickly reorder themselves and restore the skin's impermeability, he said.
  • lipids are a broad group of molecules such as fats and waxes that don't dissolve in water.
  • lipids are the building blocks of the fats and fatty substances found in animals and plants.
  • lipids naturally form spheres and also they, kind of, naturally come together.
  • Some fiber, especially soluble fiber, binds to lipids such as cholesterol.
  • These companion materials are fatty compounds known as lipids.
  • Weight gain and elevated lipids are risk factors for diabetes.
  • Fatty casts are seen in people who have lipids in urine, usually as a complication of nephrotic syndrome.
British Dictionary definitions for lipids


/ˈlaɪpɪd; ˈlɪpɪd/
(biochem) any of a large group of organic compounds that are esters of fatty acids (simple lipids, such as fats and waxes) or closely related substances (compound lipids, such as phospholipids): usually insoluble in water but soluble in alcohol and other organic solvents. They are important structural materials in living organisms Former name lipoid
Word Origin
C20: from French lipide, from Greek lipos fat
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for lipids



"organic substance of the fat group," from French lipide, coined 1923 by G. Bertrand from Greek lipos "fat, grease" (see lipo-) + chemical suffix -ide.

Online Etymology Dictionary, © 2010 Douglas Harper
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lipids in Medicine

lipid lip·id (lĭp'ĭd, lī'pĭd) or lip·ide (lĭp'īd', lī'pīd')
Any of a group of organic compounds, including the fats, oils, waxes, sterols, and triglycerides, that are insoluble in water but soluble in common organic solvents, are oily to the touch, and together with carbohydrates and proteins constitute the principal structural material of living cells.

lip·id'ic adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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lipids in Science
Any of a large group of organic compounds that are oily to the touch and insoluble in water. Lipids include fatty acids, oils, waxes, sterols, and triglycerides. They are a source of stored energy and are a component of cell membranes.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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lipids in Culture
lipids [(lip-idz, leye-pidz)]

A group of organic molecules that includes fats, oils, and waxes. Lipids do not dissolve in water. In animals, including humans, lipids store energy and form parts of cell structures, such as cell membranes.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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