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Longman Dictionary of Contemporary English
▪ At trial entry, however, there were mild abnormalities of fasting serum lipids in 12 patients.
▪ In these and the remaining 70 patients, the serum lipids remained unchanged throughout the study.
▪ It would therefore appear that nutritional modifications in themselves have an important effect on serum lipids and lipoproteins.
▪ Alcohol intake, serum lipids and obesity Alcohol may have several effects on serum lipids.
▪ The most frequent effect of excess alcohol intake on serum lipids is elevation of triglyceride levels.
▪ These drugs may also adversely affect serum lipids and lipoproteins.
▪ All other lipids were purchased from Sigma Chemical Co.
▪ In the first type the diet is high in alcohol, protein, and lipids.
▪ It also plays an important role in lipid, carbohydrate, and protein metabolism of adults.
▪ Likewise, no chart recorded either a blood lipid profile or any laboratory test relevant to diabetes.
▪ Museum curators know this because whale bones stashed on archival shelves will weep lipids for decades.
▪ Such lipid accumulation frequently leads to mental retardation or progressive loss of central nervous system functions.
▪ The Catalina skeleton on the seafloor is slowly releasing its lipids.
▪ Usually it is covert and can only be diagnosed by specifically measuring blood lipids.
The Collaborative International Dictionary

lipid \lip"id\ n. [Gr. li`pos fat.] (Chem., Biochem.) Any of a variety of oily or greasy organic compounds found as major structural components of living cells; they are insoluble in water but soluble in organic solvents such as alcohol and ether, and include the common fats, cholesterol and other steroids, phospholipids, sphingolipids, waxes, and fatty acids; some of the lipids, together with proteins and carbohydrates, form an essential structural component of living cells, as in the cell walls and membranes. The term lipid refers to its solubility in nonpolar solvents, and has no significance with regard to chemical structure.

Syn: lipide, lipoid.

Douglas Harper's Etymology Dictionary

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


n. (context organic compound English) Any of a group of organic compounds including the fats, oils, waxes, sterols, and triglycerides. Lipids are characterized by being insoluble in water, and account for most of the fat present in the human body. They are, however, soluble in nonpolar organic solvents.


n. an oily organic compound insoluble in water but soluble in organic solvents; essential structural component of living cells (along with proteins and carbohydrates) [syn: lipide, lipoid]


Lipids are a group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E, and K), monoglycerides, diglycerides, triglycerides, phospholipids, and others. The main biological functions of lipids include storing energy, signaling, and acting as structural components of cell membranes. Lipids have applications in the cosmetic and food industries as well as in nanotechnology.

Lipids may be broadly defined as hydrophobic or amphiphilic small molecules; the amphiphilic nature of some lipids allows them to form structures such as vesicles, multilamellar/ unilamellar liposomes, or membranes in an aqueous environment. Biological lipids originate entirely or in part from two distinct types of biochemical subunits or "building-blocks": ketoacyl and isoprene groups. Using this approach, lipids may be divided into eight categories: fatty acids, glycerolipids, glycerophospholipids, sphingolipids, saccharolipids, and polyketides (derived from condensation of ketoacyl subunits); and sterol lipids and prenol lipids (derived from condensation of isoprene subunits).

Although the term lipid is sometimes used as a synonym for fats, fats are a subgroup of lipids called triglycerides. Lipids also encompass molecules such as fatty acids and their derivatives (including tri-, di-, monoglycerides, and phospholipids), as well as other sterol-containing metabolites such as cholesterol. Although humans and other mammals use various biosynthetic pathways both to break down and to synthesize lipids, some essential lipids cannot be made this way and must be obtained from the diet.

Usage examples of "lipid".

In particular, those vesicles that have developed the ability to synthesize simple proteins that stabilize their delicate lipid bilayer membranes will be more likely to survive than those that have not.

With each succeeding edition of his books, Montignac put more stress on the difference between bad lipids and good lipids, between saturated, polyunsaturated, and monounsaturated fats, not for losing more weight but for keeping your heart healthy.

Effectiveness of a low-fat vegetarian diet in altering serum lipids in healthy premenopausal women: Antimicrobial and antioxidant activities of unripe papaya.

The first is a series of autocatalytic chemical reactions concentrated within tiny vesicles whose skins are self-organizing lipid bilayers.

With each succeeding edition of his books, Montignac put more stress on the difference between bad lipids and good lipids, between saturated, polyunsaturated, and monounsaturated fats, not for losing more weight but for keeping your heart healthy.

They are mostly differences in their lipids and an absence of something called peptidoglycan.

They utilize such energy in a way similar to that of green plant photosynthesis, transforming carbon dioxide into carbohydrates, lipids, and proteins which are then used as food by a surrounding community of other animals.

Blood, tissues, teeth, and organs began to congeal in place as the nano-assemblers pumped synthetic enzymes, DNA, ribosomes, and other cellular machinery into the lipid vesicles that were due to become living cells.

Pesticides in general have a fondness for the lipids (fats) and thus tend to wind up in the adipose tissue, or body fat.

The tricky part was to keep the molecule lipid soluble, so it would cross the blood-brain barrier.

But it will rupture a lot of cell membranes, leaving behind all those membranes as a lipid crud.

The fatty acid composition of viral lipids and host cell membranes would perhaps be similar, meaning I could tell in what species of host any particular virion was replicated.

He claimed that, while they were essentially similar to earthly bacteria in structure, being based upon proteins, carbohydrates, and lipids, they had no cell nucleus and therefore their manner of propagation was a mystery.

These encodes are permeated with drug beads, whose lipid membranes are kept aligned by a low-power magnetic field the Cetagandans were generating in the dome.

Then the glycan chunks are hauled out to the cell wall by a chemical scaffolding of lipid carrier molecules, and they are fitted in place.