Definition of fiber in US English:

fiber

(British fibre)

noun

  • 1A thread or filament from which a vegetable tissue, mineral substance, or textile is formed.

    ‘tropical elements like coconut fibers and branches’
    • ‘Vegetable fibers were used by ancient man for fishing and trapping.’
    • ‘It is also the most stain resistant because unlike wool, its fibers do not accept dyes and colors easily.’
    • ‘The EPCH also plans to include a complete product group of floor coverings made of natural fibres including coir, jute, cotton, silk and wool.’
    • ‘The asbestos fibres got stuck in the hand-knitted socks and jumpers.’
    • ‘This superfine cloth comes from our own traditional handlooms woven out of natural fibres like cotton, linen, silk, wool, jute, etc. and soaked in natural dyes.’
    • ‘Jute is a vegetable fiber cultivated in China, India, Pakistan, and other south Asia countries.’
    • ‘While wool is excellent at hiding dirt, any dirt that does become embedded in the carpet is prone to damage the fibers by abrasion.’
    • ‘Felt fabric is a compact sheet of entangled, not woven wool, fur, sometimes cotton fibers.’
    • ‘The original focus industries were pottery, sericulture, carpentry, textiles, coconut fiber, and woven mats.’
    • ‘Blankets, in the form of batts or rolls, are flexible products made from mineral fibers.’
    • ‘Fabric wallpaper are usually made of cotton, linen, or other natural plant fibers, such as grass cloth, hemp, or burlap.’
    • ‘Hot glass fibers for insulation and nylon fibers for textiles are extruded through platinum sieves.’
    • ‘Until the 19th cent. wool fibres dominated knitting but other textile fibres came into use.’
    • ‘Hats, mats, hammocks, and baskets are made with different types of cane and reed as well as fibers from the maguey cactus.’
    • ‘With its qualities of strength and texture, and the ability to be dyed in vibrant colours, silk proved an unequalled fibre for textile production.’
    • ‘Because they are composed of vegetable fibers, EcoDragon's sandals can be composted once they're worn out.’
    • ‘A rope is a ply of natural threads or synthetic fibers.’
    • ‘A buff is made from a non-woven fabric where the fibers are first carded and formed into a fairly thick fleece.’
    • ‘They use acid-free paper made from cotton, which is much more durable than paper made from wood because the cotton fibers are much longer.’
    • ‘Coir is a natural fibre made from coconuts and used for matting, screening, baskets and other products.’
    thread, strand, tendril, filament
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    1. 1.1 A substance formed of threads or filaments.
      ‘ordinary synthetics don't breathe as well as natural fibers’
      ‘high strength carbon fiber’
      • ‘Merino Wool is a natural fiber that absorbs 10 times more moisture than synthetics, and it does not hold odor.’
      • ‘Natural fibres in cool lightweight fabrics, teamed with slightly shaped shirts to skim the body's contours, will be de rigueur.’
      • ‘The child should wear layered natural fibers and wool socks, weather permitting.’
      • ‘The thing to keep in mind is that your fabric must be a natural fiber: cotton, rayon, silk, or linen.’
      • ‘They work in a variety of disciplines including ceramics, fibres, glass, mirror design, jewellery and photography.’
      • ‘Natural fibres such as cotton and wool can usually be washed and worn repeatedly and are always a safe bet, whereas embroidered pieces and handmade garments are treasures and should be treated with respect.’
      • ‘Floral prints in combination with light, natural fibres like chiffon, silk and linen underscore this young and natural look.’
      • ‘Both fabrics wick perspiration away from your skin while natural fibers like cotton and wool tend to get damp and clammy with sweat.’
      • ‘Natural fibres like cotton and wool can usually be washed and worn repeatedly and are always a safe bet.’
      • ‘It is possible to dye a natural fiber like pashmina, but there is no guarantee to the outcome, either in color or texture.’
      • ‘Wear clothes that are made from natural fibres like cotton, linen and silk; they allow your skin to breathe.’
      • ‘Sweeney prints mainly on silk, but also onto linen, cotton and other natural fibres.’
      • ‘In general, if the ash is soft and the odor is of burning hair or paper, the fabric is a natural fiber.’
      • ‘Opt for cotton, linen and other natural fibers that help absorb moisture and allow your body to breathe.’
      material, substance, cloth, fabric, stuff
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    2. 1.2 A threadlike structure forming part of the muscular, nervous, connective, or other tissue in the human or animal body.
      ‘there were degenerative changes in muscle fibers’
      figurative ‘she wanted him with every fiber of her being’
      • ‘Acetylcholine acts as a transmitter between motor nerves and the fibres of skeletal muscle at all neuromuscular junctions.’
      • ‘Other structures, such as connective tissue fibers and neuroglia, may be impregnated.’
      • ‘The skin of D. holocanthus is highly elastic because of microfolds in the epidermis and collagen fibers of the dermis.’
      • ‘The basic functional unit of muscle is the motor unit, which consists of a motoneuron and the muscle fibers that it innervates.’
      • ‘At early stages of development, single muscle fibers are innervated by axon terminals from several different motor neurons.’
      • ‘Huge masses of them are scattered also between the adjacent striated muscle fibers.’
      • ‘Unlike many body tissues, nerve cells and fibers in the central nervous system cannot regenerate.’
      • ‘Usually, leiomyosarcomas originate from the renal capsule, muscle fibers in the renal pelvis, or the walls of renal vessels.’
      • ‘Muscle biopsies were freed of connective tissue and muscle fibers were isolated.’
      • ‘Its fibers are found in connective tissue, including skin, bone, ligaments, and cartilage.’
      • ‘Most simply, muscle fibers activated by the nervous system produce tensile forces that are transmitted to the skeleton.’
      • ‘Individual muscle fibers may be innervated by one or both of the excitatory neurons, and generally receive inhibitory input as well.’
      • ‘A motor unit is made up of a single nerve axon and the muscle fibers it supplies.’
      • ‘My rheumatologist thought I might have torn muscle fibers in the latissimus dorsi and tried an injection of triamcinolone.’
      • ‘The middle trapezius muscle fibers, although strong, lie very close to the axis of rotation of the scapula.’
      • ‘Loose connective tissue consists of fibers running in all directions through a semifluid matrix.’
      • ‘It was defined as the most distal part of the muscle in which tendon fibers could be visualized.’
      • ‘Heat alters the fibres of connective tissue, initially by making them shorter and thicker, and then by altering the structure.’
      • ‘The muscle fibers in the mucosal muscular layer are also longitudinal, oriented along the axis of the cylindrical organ.’
      • ‘Striated skeletal muscle fibers vary in length between 2 and 25 cm, depending upon the muscle.’
    3. 1.3 Strength of character.
      ‘a weak person with no moral fiber’
      • ‘He practices his speech on moral fibre that should land him a scholarship to a prestigious university, while darting envious glances at his partying schoolmates.’
      • ‘After all, your elders are of a stronger moral fibre, having been tested in life.’
      • ‘Well I like France, at present they have slightly more moral fibre than the British Government (not a huge challenge, admittedly).’
      • ‘But the logical spin-off of the celebrity chef has been the celebration of cooking, an activity in which new moral fibre is being endlessly invested.’
      • ‘His flying was initially hampered by a rugby injury and when he reported the injury he was suspected of having a lack of moral fibre.’
      • ‘It is also intended, no doubt, to contrast British efficiency and moral fibre with Spanish and Portuguese fecklessness.’
      • ‘Because while we may find a snippet of moral fibre here and detect evidence of it there, somehow it seems to be far less plentiful these days.’
      • ‘His weak moral fibre, mixed with his genuine desire to help Kathy, does nothing but tear the fabric of both her life and Behrani's.’
      • ‘The strength has to be in the moral fibre of a people, and that sort of strength enables one to provide moral leadership in the world.’
      • ‘Only those with inordinate levels of moral fibre can visit the venue during those first couple of weeks in April and return with their former principles intact.’
      • ‘It all makes me feel rather sorry for men: as if being present at the birth has become some sort of test of moral fibre.’
      • ‘His lack of moral fibre and intellectual courage are two of his shortcomings that infuriate the most.’
      • ‘But in the very same essay, Macaulay supposes Bacon the man to be thoroughly deceitful, self-seeking, and lacking in moral fibre.’
      • ‘Medical research into the drug came to an abrupt end in the mid-1960s when LSD hit the headlines as hazardous to health and a looming shadow over society's moral fibre.’
      • ‘We can't be having people of poor moral fibre now, can we.’
      • ‘‘We [viz fat people] are normally considered to be lazy, slobbish and lacking in moral fibre,’ she declares.’
      • ‘That moral fibre will defeat the fanaticism of these terrorists and their supporters.’
      • ‘Alarmed by the decline of empire, he determined to instil moral fibre and intrepid ways into lads who, as well as contributing to civic good, might somehow keep the colonial flag flying.’
      • ‘This is so because some drugs that are being abused are not only dangerous but pose a very serious threat to life and society's moral fibre.’
      • ‘People that live on the streets do not necessarily lack moral fibre.’
      strength of character, resolution, fortitude, resolve, moral fibre, backbone, spine, mettle, firmness of purpose, toughness of spirit, steel
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  • 2Dietary material containing substances such as cellulose, lignin, and pectin, that are resistant to the action of digestive enzymes.

    ‘cereals high in fiber’
    • ‘They are high in fibre and a substance called pectin, both of which may help to control cholesterol levels in the bloodstream.’
    • ‘And a kind of fiber in apples called pectin reduces cholesterol and helps maintain steady blood sugar levels.’
    • ‘Made out of lentils, beans and spices, these little balls are rich in fibre and protein.’
    • ‘Dietary fibre consists of plant material such as cellulose, hemicellulose, pectin, polysaccharides, gums, mucilage and lignin.’
    • ‘The complex carbohydrates and fiber in whole wheat slow the release of blood sugar, providing steady energy.’
    • ‘In addition, they contain large amounts of soluble fiber, including pectin that helps to lower cholesterol.’
    • ‘Actual plant starches contain a certain amount of cellulose, another carbohydrate which is not digested by humans but supplies essential dietary fibre.’
    • ‘High consumption of dietary fiber regulates blood sugar levels, reduces cholesterol and can prevent heart disease and cancer.’
    • ‘Salad leaves are rich in a range of nutrients including fibre, folate and so-called carotenoids such as alphacarotene, lutein and zeaxanthin.’
    • ‘Previous studies have indicated that soybean protein and dietary fiber reduces cholesterol and improves insulin resistance.’
    • ‘Net impact carbs result from replacing wheat flour with soy flour or adding fiber, sugar alcohols or fat.’
    • ‘Each recipe is analyzed for calcium but also for calories, protein, fat, carbohydrate, dietary fiber, sodium, and magnesium.’
    • ‘As pears are dense, they are also a good source of fibre and pectin.’
    • ‘It is a rich source of carbohydrates, protein, fiber, amino acids, minerals, sterols, and fatty acids.’
    • ‘Besides soy protein, the yogurts include added fiber and vitamins C and D and are lactose reduced.’
    • ‘Protein, fat and fiber keep blood sugar levels more even and help keep such cravings under control.’
    • ‘Sprouts are an excellent source of digestible protein, fibre, and Vitamin C, and are full of antioxidants.’
    • ‘Dry beans, peas, and lentils offer protein and fiber without the cholesterol and fat that meats have.’
    • ‘It is what is lacking in our food - the vitamins, minerals, fibre, phytochemicals and micro-nutrients in a plant-based diet - that counts.’
    • ‘Yes, a ruminant couldn't live on roughage without the bugs, because these digest the tough cellulose fibre in the plants the animals eat.’
    roughage, bulk, fibrous material
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Origin

Late Middle English (in the sense ‘lobe of the liver’, (plural) ‘entrails’): via French from Latin fibra ‘fiber, filament, entrails’.

Pronunciation

fiber

/ˈfaɪbər//ˈfībər/