lip·id

[lip-id, lahy-pid]
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, lip·ide [lip-ahyd, -id, lahy-pahyd, -pid] .


Origin:
1920–25; lip- + -id3

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
lipid or lipide (ˈlaɪpɪd, ˈlɪpɪd, ˈlaɪpɪd, ˈlɪpɪd) [Click for IPA pronunciation guide]
 
n
biochem Former name: lipoid 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
 
[C20: from French lipide, from Greek lipos fat]
 
lipide or lipide
 
n
 
[C20: from French lipide, from Greek lipos fat]

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Lipids is always a great word to know.
So is lollapalooza. Does it mean:
a stew of meat, vegetables, potatoes, etc.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
Etymonline
Word Origin & History

lipid
"organic substance of the fat group," from Fr. lipide, coined 1923 by G. Bertrand from Gk. lipos "fat, grease" (see leave (v.)) + chemical suffix -ide.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

lipid lip·id (lĭp'ĭd, lī'pĭd) or lip·ide (lĭp'īd', lī'pīd')
n.
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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American Heritage
Science Dictionary
lipid   (lĭp'ĭd)  Pronunciation Key 
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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American Heritage
Cultural Dictionary
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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Example sentences
That, in turn, stops them oxidising lipids and opens those cells to lipids'
  toxic effects.
They move cholesterol, triglycerides, and other lipids to different parts of
  the body.
The researchers found that a mixture of fatty acids and lipids can mimic the
  venom's neurotoxic effects.
Eating a low-fat diet, taking drugs to control lipids, and getting regular
  exercise can also help prevent or slow kidney damage.
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