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fat – Full Definition

metabolism - Full Definition
Fat – /fat/ – noun
1. the adipose tissue of the body.
2. a triglyceride (or triacylglycerol) that is an ester of fatty acids and glycerol. Each fat molecule contains one glycerol residue connected by ester linkages to three fatty acid residues, which may be the same or different. The fatty acids may have no double bonds in the carbon chain (saturated fatty acids), one double bond (monounsaturated), or two or more double bonds (polyunsaturated). Essential fatty acids cannot be synthesized by the body but must be obtained from the diet or from intravenous infusion of lipids.Saturated and Unsaturated Fats. All of the common unsaturated fatty acids are liquid (oils) at room temperature. Through the process of hydrogenation, hydrogen can be incorporated into certain unsaturated fatty acids so that they are converted into solid fats for cooking purposes. Margarine is an example of the hydrogenation of unsaturated fatty acids into a solid substance.
brown fat a thermogenic type of adipose tissue containing a dark pigment, and arising during embryonic life in certain specific areas in many mammals, including humans (see illustration); it is prominent in the newborn. Called also brown adipose tissue.
neutral fat fat (def. 2).
polyunsaturated fat a fat containing polyunsaturated fatty acids; see also fat.
saturated fat a fat containing saturated fatty acids; see also fat.
unsaturated fat a fat containing unsaturated fatty acids; see also fat.
fat
(fat), 1. Synonym(s): adipose tissue
2. Common term for obese.
3. A greasy, soft-solid material, found in animal tissues and many plants, composed of a mixture of glycerol esters; together with oils, fats comprise the homolipids.
4. A triacylglycerol or a mixture of triacylglycerols.
[A.S. faet]
fat
(făt)n.1. a. The ester of glycerol and one, two, or three fatty acids.
b. Any of various soft, solid, or semisolid organic compounds constituting the esters of glycerol and fatty acids and their associated organic groups.
c. A mixture of such compounds occurring widely in organic tissue, especially in the adipose tissue of animals and in the seeds, nuts, and fruits of plants.
d. Animal tissue containing such substances.
e. A solidified animal or vegetable oil.
2. Obesity; corpulence: health risks associated with fat.
adj. fatter, fattest 1. Having much or too much fat or flesh; plump or obese.
2. Full of fat or oil; greasy.
fat
A generic term for any of a class of neutral organic compounds formed by a molecule of glycerol linked to three fatty acids (a glycerol ester); fats are water-insoluble, ether soluble, solid at less than 20ºC, combustible and energy-rich (9.3 kcal/g).Segen’s Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
fat
Any of a class of neutral organic compounds formed by a molecule of glycerol linked to 3 fatty acids–a glycerol ester; fats are water-insoluble, ether soluble, solid at ≤ 20ºC, combustible, energy-rich–9.3 kcal/g. See Animal fat, Baby fat, Fatty acids, Fish oil, Monounsaturated fat, Olive oil, Polyunsaturated fat, Saturated fatty acid, Tropical fat, Tropical oil, Unsaturated fat. McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
fat
(fat) 1. Synonym(s): adipose tissue.
2. Common colloquial term for obese
3. A greasy, soft-solid material, found in animal tissues and many plants, composed of a mixture of glycerol esters; together with oils they make up the homolipids.
4. A triacylglycerol or a mixture of triacylglycerols.
[A.S. faet]
fat
a type of simple LIPID found in almost all organisms, which is an important energy-storage molecule (containing twice as much energy as carbohydrates per gram) that can also aid in heat insulation, cushioning and protection. Fats are produced by a combination of one glycerol molecule, and three fatty acid molecules (which need not all be the same) forming a triglyceride. Fats are abundant in plant seeds, and are also found in roots, stems and leaves, forming about 5% of the total dry weight. In animals, fats are stored in specialized cells making up ADIPOSE TISSUE. See also BROWN FAT.Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
fat
(fat) 1. Synonym(s): adipose tissue.
2. Common term for obese
3. A greasy, soft-solid material, found in animal tissues and many plants, composed of a mixture of glycerol esters; together with oils, fats comprise the homolipids.
4. A triacylglycerol or a mixture of triacylglycerols.
[A.S. faet]

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Source – The Free Dictionary
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