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lipid
lip·id L0191600 (lĭp′ĭd, lī′pĭd) also 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 nonpolar organic solvents, are oily to the touch, and together with carbohydrates and proteins constitute the principal structural material of living cells.
[French lipide : Greek lipos, fat; see lipo- + French -ide, -ide.]
lip·id′ic adj.lipid (ˈlaɪpɪd; ˈlɪpɪd) or lipiden (Biochemistry) 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 [C20: from French lipide, from Greek lipos fat]lip•id (ˈlɪp ɪd, ˈlaɪ pɪd) also lip•ide (-aɪd, -ɪd; -paɪd, -pɪd)
n. any of a group of organic compounds comprising fats, waxes, and similar substances that are greasy, insoluble in water, and soluble in alcohol: one of the chief structural components of the living cell. [< French lipide (1923) = Greek líp(os) fat + French -ide -id3] lip·id (lĭp′ĭd) Any of a large group of organic compounds composed of fats and fatty 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.Thesaurus| Noun | 1. | lipid - an oily organic compound insoluble in water but soluble in organic solvents; essential structural component of living cells (along with proteins and carbohydrates)lipide, lipoidfat - a soft greasy substance occurring in organic tissue and consisting of a mixture of lipids (mostly triglycerides); "pizza has too much fat"triglyceride - glyceride occurring naturally in animal and vegetable tissues; it consists of three individual fatty acids bound together in a single large molecule; an important energy source forming much of the fat stored by the bodymacromolecule, supermolecule - any very large complex molecule; found only in plants and animalsoil - a slippery or viscous liquid or liquefiable substance not miscible with waterphospholipid - any of various compounds composed of fatty acids and phosphoric acid and a nitrogenous base; an important constituent of membraneswax - any of various substances of either mineral origin or plant or animal origin; they are solid at normal temperatures and insoluble in water |
Translationslipid
lipid, lipide 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 Lipid One of a class of compounds which contains long-chain aliphatic hydrocarbons (cyclic or acyclic) and their derivatives, such as acids (fatty acids), alcohols, amines, amino alcohols, and aldehydes. The presence of the long aliphatic chain as the characteristic component of lipids confers distinct solubility properties on the simpler members of this class of naturally occurring compounds. The lipids are generally classified into the following groups: - A. Simple lipids
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- 1. Triglycerides or fats and oils are fatty acid esters of glycerol. Examples are lard, corn oil, cottonseed oil, and butter.
- 2. Waxes are fatty acid esters of long-chain alcohols. Examples are beeswax, spermaceti, and carnauba wax.
- 3. Steroids are lipids derived from partially or completely hydrogenated phenanthrene. Examples are cholesterol and ergosterol.
- B. Complex lipids
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- 1. Phosphatides or phospholipids are lipids which contain phosphorus and, in many instances, nitrogen. Examples are lecithin, cephalin, and phosphatidyl inositol.
- 2. Glycolipids are lipids which contain carbohydrate residues. Examples are sterol glycosides, cerebrosides, and plant phytoglycolipids.
- 3. Sphingolipids are lipids containing the long-chain amino alcohol sphingosine and its derivatives. Examples are sphingomyelins, ceramides, and cerebrosides.
Lipids are present in all living cells, but the proportion varies from tissue to tissue. The triglycerides accumulate in certain areas, such as adipose tissue in the human being and in the seeds of plants, where they represent a form of energy storage. The more complex lipids occur closely linked with protein in the membranes of cells and of subcellular particles. More active tissues generally have a higher complex lipid content; for example, the brain, liver, kidney, lung, and blood contain the highest concentration of phosphatides in the mammal. See Fat and oil, Fat and oil (food), Glycolipid, Sphingolipid, Steroid, Terpene, Triglyceride, Vitamin, Wax, animal and vegetable lipid[′lip·əd] (biochemistry) One of a class of compounds which contain long-chain aliphatic hydrocarbons and their derivatives, such as fatty acids, alcohols, amines, amino alcohols, and aldehydes; includes waxes, fats, and derived compounds. Also known as lipin; lipoid. lipid
lipid [lip´id] a group of substances comprising fatty, greasy, oily, and waxy compounds that are insoluble in water and soluble in nonpolar solvents, such as hexane, ether, and chloroform.
Simple lipids are the triglycerides or neutral fats. Each triglyceride molecule is composed of one molecule of glycerol joined by ester linkages to three fatty acid molecules. They are an important source of fuel to the body and a much lighter form of energy storage than carbohydrate.
Compound lipids are important structural components of cell membranes. Phospholipids include lecithin and the cephalins, which are composed of fatty acids linked to phosphatidic acid, and the sphingomyelins, which are composed of fatty acids linked to sphingosine. Glycolipids are composed of a carbohydrate chain and fatty acids linked to sphingosine or ceramide. Cholesterol is a steroid alcohol. Another important function of the phospholipids is as lung surfactants.
Intravenous lipid emulsions can be administered to patients with a deficiency of essential fatty acids.lip·id (lip'id), "Fat-soluble," an operational term describing a solubility characteristic, not a chemical substance, that is, denoting substances extracted from animal or vegetable cells by nonpolar solvents; included in the heterogeneous collection of materials thus extractable are fatty acids, glycerides and glyceryl ethers, phospholipids, sphingolipids, long-chain alcohols and waxes, terpenes, steroids, and "fat-soluble" vitamins such as A, D, and E. [G. lipos, fat] lipid (lĭp′ĭd, lī′pĭd) also lipide (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 nonpolar 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.LIPID Cardiology A clinical trial–Long-Term Intervention with Pravastatin in Ischemic Disease–which evaluated preventing cardiovascular M&M with pravastatin in Pts with CAD and a range of initial cholesterol levelslip·id (lip'id) "Fat-soluble," an operational term describing a solubility characteristic, not a chemical substance, i.e., denoting substances extracted from animal or vegetable cells by nonpolar solvents; included in the heterogeneous collection of materials thus extractable are fatty acids, glycerides, glyceryl ethers, phospholipids, sphingolipids, long-chain alcohols, waxes, terpenes, steroids, and "fat-soluble" vitamins such as A, D, and E. lipid a biological compound composed of glycerol and fatty acid components, containing carbon, hydrogen and oxygen together with other elements such as nitrogen and phosphorus. Lipids (or fats) are structural components of cell membranes and nervous tissue, and are important sources of energy, being stored in various parts of the body (see ADIPOSE TISSUE). They are important insulators and mechanical protectors. Their large molecular size makes lipids insoluble in water, but soluble in organic solvents such as acetone and ether. There are five lipid groups: triglycerides (fats and oils) phospholipids glycolipids sterols and steroids waxes LipidA greasy organic compound that cannot be dissolved in water. Triglycerides, which are broken down by lipase, are one type of blood lipid.Mentioned in: Cholesterol, High, Cholesterol Test, Lipase Testlip·id (lip'id) "Fat-soluble," operational term describing a solubility characteristic, not a chemical substance, i.e., denoting substances extracted from animal or vegetable cells by nonpolar solvents. lipid
Related to lipid: cholesterol, Lipid metabolism, lipid profileSynonyms for lipidnoun an oily organic compound insoluble in water but soluble in organic solventsSynonymsRelated Words- fat
- triglyceride
- macromolecule
- supermolecule
- oil
- phospholipid
- wax
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