corduroy, a cut filling-pile fabric with lengthwise ridges, or wales, that may vary from fine (pinwale) to wide. Extra filling yarns float over a number of warp yarns that form either a plain-weave or twill-weave ground. After the fabric is woven the floating yarns are cut, and the pile is brushed and singed to produce a clear cord effect. Originally a cotton fabric, it may also be made of man-made fibers such as rayon, polyester, or acrylic. It is used in the manufacture of trousers, coats, and slip covers.