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Definition
 
enEnglish
Dietary Fats definition: Fats present in food, especially in animal products such as meat, meat products, butter, ghee. They are present in lower amounts in nuts, seeds, and avocados.
dietary lipid definition: lipids present in food.
Dietary Lipid definition: A chemically heterogeneous group of organic compounds found in food that are insoluble in water but soluble in nonpolar solvents.
Dietary Lipid definition: A class of food constituents, also known as fats and oils, that serve as a source of energy and essential fatty acids in animals. The major components of lipids are fatty acids, triglycerides, phospholipids, glycolipids, sphingolipids, steroids (cholesterol), and lipoproteins.
Lipid A definition: Lipid A is the biologically active component of lipopolysaccharides. It shows strong endotoxic activity and exhibits immunogenic properties.
Lipid Bilayers definition: Layers of lipid molecules which are two molecules thick. Bilayer systems are frequently studied as models of biological membranes.
lipid bilayer membrane definition: two layers of phospholipids, forming the basic structure of a biological membrane; bilayer systems are frequently studied as models of biological membranes.
Lipid Mobilization definition: LIPOLYSIS of stored LIPIDS in the ADIPOSE TISSUE to release FREE FATTY ACIDS. Mobilization of stored lipids is under the regulation of lipolytic signals (CATECHOLAMINES) or anti-lipolytic signals (INSULIN) via their actions on the hormone-sensitive LIPASE. This concept does not include lipid transport.
Lipid Peroxidation definition: Peroxidase catalyzed oxidation of lipids using hydrogen peroxide as an electron acceptor.
Lipid Peroxides definition: Peroxides produced in the presence of a free radical by the oxidation of unsaturated fatty acids in the cell in the presence of molecular oxygen. The formation of lipid peroxides results in the destruction of the original lipid leading to the loss of integrity of the membranes. They therefore cause a variety of toxic effects in vivo and their formation is considered a pathological process in biological systems. Their formation can be inhibited by antioxidants, such as vitamin E, structural separation or low oxygen tension.
lipid peroxide definition: peroxides produced in the presence of a free radical by the oxidation of unsaturated fatty acids in the cell in the presence of molecular oxygen; results in the destruction of the original lipid leading to the loss of integrity of the membranes.
Lipids definition: A generic term for fats and lipoids, the alcohol-ether-soluble constituents of protoplasm, which are insoluble in water. They comprise the fats, fatty oils, essential oils, waxes, phospholipids, glycolipids, sulfolipids, aminolipids, chromolipids (lipochromes), and fatty acids. (Grant & Hackh's Chemical Dictionary, 5th ed)
lipid definition: any of a class of hydrophobic biochemicals including fats, long- chain fatty acids, steroids, oils, and waxes.
Lipid definition: A class of hydrocarbon-containing organic compounds. Lipids are insoluble in water but soluble in nonpolar solvents and play important roles in living organisms: these roles include functioning as energy storage molecules, serving as structural components of cell membranes, and constituting important signaling molecules. Lipids can be subdivided into 2 groups: fatty acids and glycerides.
Lipolysis definition: The metabolic process of breaking down LIPIDS to release FREE FATTY ACIDS, the major oxidative fuel for the body. Lipolysis may involve dietary lipids in the DIGESTIVE TRACT, circulating lipids in the BLOOD, and stored lipids in the ADIPOSE TISSUE or the LIVER. A number of enzymes are involved in such lipid hydrolysis, such as LIPASE and LIPOPROTEIN LIPASE from various tissues.
lipolysis definition: decomposition or splitting up of fats or lipids.
lipid catabolic process definition: The chemical reactions and pathways resulting in the breakdown of lipids, compounds soluble in an organic solvent but not, or sparingly, in an aqueous solvent. [GOC:go_curators]
Niemann Pick disease definition: caused by deficiency of sphingomyelinase, resulting in accumulation of sphingomyelin in the reticuloendothelial system, mental and physical retardation, enlarged liver and spleen, anemia, and blindness.
Niemann-Pick Diseases definition: A group of autosomal recessive disorders in which harmful quantities of lipids accumulate in the viscera and the central nervous system. They can be caused by deficiencies of enzyme activities (SPHINGOMYELIN PHOSPHODIESTERASE) or defects in intracellular transport, resulting in the accumulation of SPHINGOMYELINS and CHOLESTEROL. There are various subtypes based on their clinical and genetic differences.
Pneumonia, Lipid definition: Pneumonia due to aspiration or inhalation of various oily or fatty substances.
Lipid Metabolism Disorders definition: Pathological conditions resulting from abnormal anabolism or catabolism of lipids in the body.
lipid disorder definition: condition in which there is a deviation or interruption in the processing of lipids in the body: synthesis, absorption, transport, storage, and utilization.
lipid particle definition: Any particle of coalesced lipids in the cytoplasm of a cell. May include associated proteins. [GOC:mah]
Lipid droplet definition: Cell substance contained in lipid vacoule.
Lipid droplet definition: Cell substance contained in lipid vacoule.
Lipid Measurement definition: A quantitative measurement of the amount of lipids (cholesterol, lipoproteins, and triglycerides) present in a sample.
blood lipid definition: level and type of lipid found in the blood.
lipid solubility definition: quality or fact of being soluble in any of a class of hydrophobic biochemicals including fats, long- chain fatty acids, steroids, oils, and waxes; susceptibility of being dissolved by a lipid.
lipid transport definition: The directed movement of lipids into, out of, within or between cells. Lipids are compounds soluble in an organic solvent but not, or sparingly, in an aqueous solvent. [ISBN:0198506732 "Oxford Dictionary of Biochemistry and Molecular Biology"]
lipid transport definition: movement of lipids through a biological system; can be across cell membranes and epithelial layers and also can occur within intracellular compartments and extracellular compartments.
Lipid Transport definition: Any subcellular or molecular event, process, or condition involved in translocation of a lipid macromolecule from one site or compartment to another. (NCI)
lipid metabolic process definition: The chemical reactions and pathways involving lipids, compounds soluble in an organic solvent but not, or sparingly, in an aqueous solvent. Includes fatty acids; neutral fats, other fatty-acid esters, and soaps; long-chain (fatty) alcohols and waxes; sphingoids and other long-chain bases; glycolipids, phospholipids and sphingolipids; and carotenes, polyprenols, sterols, terpenes and other isoprenoids. [GOC:ma]
lipid metabolism definition: sum of chemical changes that occur within the tissues of an organism consisting of anabolism (biosynthesis) and catabolism of lipids; the buildup and breakdown of lipids for utilization by the organism.
Lipid Metabolism definition: Anabolic and catabolic biochemical changes to the hydrophobic class of biochemicals within a cell as materials needed for important life processes.
Lipid Metabolism definition: Physiological processes in biosynthesis (anabolism) and degradation (catabolism) of LIPIDS.
Erdheim-Chester Disease definition: A rare form of non-Langerhans-cell histiocytosis (HISTIOCYTOSIS, NON-LANGERHANS-CELL) with onset in middle age. The systemic disease is characterized by infiltration of lipid-laden macrophages, multinucleated giant cells, an inflammatory infiltrate of lymphocytes and histiocytes in the bone marrow, and a generalized sclerosis of the long bones.
lipid binding definition: OBSOLETE (was not defined before being made obsolete). [GOC:go_curators]
lipid binding definition: Interacting selectively with a lipid. [GOC:ai]
Lipid Binding definition: Lipid Binding is the molecular interaction between a lipid molecule and a macromolecule (usually protein) for transport, catalysis, localization, or modification of function.
lipid A biosynthetic process definition: The chemical reactions and pathways resulting in the formation of lipid A, the glycolipid moiety of bacterial lipopolysaccharides, consisting of six fatty acyl chains linked to two glucosamine residues. [ISBN:0198506732 "Oxford Dictionary of Biochemistry and Molecular Biology"]
lipid A metabolic process definition: The chemical reactions and pathways involving lipid A, the glycolipid moiety of bacterial lipopolysaccharides, consisting of six fatty acyl chains linked to two glucosamine residues. [ISBN:0198506732 "Oxford Dictionary of Biochemistry and Molecular Biology"]
lipid modification definition: The covalent alteration of one or more fatty acids in a lipid, resulting in a change in the properties of the lipid. [GOC:mah]
lipid glycosylation definition: Covalent attachment of a glycosyl residue to a lipid molecule. [GOC:mah]
lipid storage definition: The accumulation and maintenance in cells or tissues of lipids, compounds soluble in organic solvents but insoluble or sparingly soluble in aqueous solvents. Lipid reserves can be accumulated during early developmental stages for mobilization and utilization at later stages of development. [GOC:dph, GOC:mah, GOC:tb, PMID:11102830]
membrane raft definition: Any of the small (10-200 nm), heterogeneous, highly dynamic, sterol- and sphingolipid-enriched membrane domains that compartmentalize cellular processes. Small rafts can sometimes be stabilized to form larger platforms through protein-protein and protein-lipid interactions. [PMID:16645198]
lipid raft definition: localized regions of elevated cholesterol and glycosphingolipid content within cell membranes; implicated in cellular processes such as membrane sorting, vesicle transport and signal transduction.
lipid phosphorylation definition: The process of introducing one or more phosphate groups into a lipid, any member of a group of substances soluble in lipid solvents but only sparingly soluble in aqueous solvents. [GOC:bf, ISBN:0198506732 "Oxford Dictionary of Biochemistry and Molecular Biology"]
Lipid Biochemistry definition: The study of the biochemistry of lipids, including enzyme action.
Lipid Chemistry definition: The 'test tube' chemical reactions of lipids-not involving enzymes
lipid digestion definition: The whole of the physical, chemical, and biochemical processes carried out by living organisms to break down ingested lipids into components that may be easily absorbed and directed into metabolism. [GOC:go_curators]
lipid biosynthetic process definition: The chemical reactions and pathways resulting in the formation of lipids, compounds soluble in an organic solvent but not, or sparingly, in an aqueous solvent. [GOC:go_curators]
lipid biosynthesis definition: anabolic formation of lipid compounds in organisms or living cells; this includes fats, long-chain fatty acids, and oils.
Lipogenesis definition: De novo fat synthesis in the body. This includes the synthetic processes of FATTY ACIDS and subsequent TRIGLYCERIDES in the LIVER and the ADIPOSE TISSUE. Lipogenesis is regulated by numerous factors, including nutritional, hormonal, and genetic elements.
lipid translocation definition: The translocation, or flipping, of lipid molecules from one monolayer of a membrane bilayer to the opposite monolayer. [GOC:mah]
lipid homeostasis definition: Any process involved in the maintenance of an internal equilibrium of lipid within an organism or cell. [GOC:rl]
lipid localization definition: Any process by which a lipid is transported to, or maintained in, a specific location. [GOC:dph, GOC:tb]
lipid oxidation definition: The removal of one or more electrons from a lipid, with or without the concomitant removal of a proton or protons, by reaction with an electron-accepting substance, by addition of oxygen or by removal of hydrogen. [GOC:mah]
 
 
frFrench
lipide definition: Molécule hydrophobe ou amphipathique qui constitue la matière grasse des êtres vivants.