Fiber, also spelled fibre, is a class of materials that are continuous filaments or are in discrete elongated pieces, similar to lengths of thread.
http://en.wikipedia.org/wiki/Fiber

Fibre Federal Credit Union has been serving the people and communities of Southwest Washington and Cowlitz County, Washington since 1937.
http://www.fibrecu.com/

Fibre is an important component of a healthy balanced diet. We get fibre from plant-based foods, but it's not something the body can absorb. This means fibre is not a nutrient ...
http://www.netdoctor.co.uk/focus/nutrition/facts/lifestylema ...

fibre Fibre is the indigestible part of plants. It includes cellulose, hemi-cellulose, lignin, pectin, and gums
http://www.answers.com/topic/fibre-1

Definition of word from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.
http://www.merriam-webster.com/dictionary/fibre