Composite material containing glass fibers, including glass fabrics and resins reinforced with glass fibers; fiberglass is strong, lightweight, nonflammable, with a high tensile strength. The material dates to 1893, when spun glass fibers were made into fabric by Edward D. Libbey and exhibited at the Columbian Exhibition in Chicago. Owen-Corning developed several processes for making fine, continuous glass fibers in the 1930s, which were sold under the trademark of ‘Fiberglas.’ Over time, the term 'fiberglass' became generally used for all glass fiber products.

Source: AAT

http://vocab.getty.edu/page/aat/300183781