fiber

noun

• 1a thread or filament from which a vegetable tissue, mineral substance, or textile is formed:tropical elements like coconut fibers and branches
• a substance formed of threads or filaments:ordinary synthetics don’t breathe as well as natural fibers high strength carbon fiber
• 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 figurativeshe wanted him with every fiber of her being
• strength of character:a weak person with no moral fiber

• 2dietary material containing substances such as cellulose, lignin, and pectin, which are resistant to the action of digestive enzymes:cereals high in fiber