Whipcord
Whipcord is the name for either a fabric or a form of braided cord.
The fabric whipcord is a strong worsted or cotton fabric made of hard-twisted yarns with a diagonal cord or rib. The weave used for whipcord is a steep-angled twill, essentially the same weave as a cavalry twill or a steep gabardine. However, the ribs of whipcord are usually more pronounced than in either of those fabrics, and the weft (filling) may be visible between the ribs on the right side, which is usually not the case for gabardines. In practice, marketing considerations, rather than technical details, determine when the specific term whipcord is used.