Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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acrylic fiber any of a group of synthetic fibers that are made chiefly of acrylonitrile that has been formed into polymers.
fiber optics a method of transmitting light through fine transparent flexible strands, usu. of glass or plastic.
high-fiber of a diet or food substance, containing a high concentration of undigestible plant carbohydrates.