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fibre

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noun fibre pronunciation in British English /ˈfaɪbə(r)/ 
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singularfibre
pluralfibres
  1. 1
    [uncountable] the parts of fruit, vegetables, and grains that your body cannot digest (=change into substances it can use). It helps food to pass through your body
    high/rich/low in fibre:

    foods that are high in fibre

    dietary fibre:

    Dietary fibre helps protect us from disease.

  2. 2
    [countable] a long thin piece of a natural or artificial substance, similar to a thread or hair in shape

    Coir is a strong material made from coconut fibres.

    1. a.
      [countable/uncountable] a type of cloth or other material made of fibres

      tubes made of carbon fibre

      man-made/synthetic/natural fibre:

      natural fibres such as linen and cotton

  3. 3
    [countable/uncountable] one of the thin pieces that form the nerves and muscles in your body
    nerve/muscle fibre:

    Messages pass along the nerve fibres.

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