Filament: A fiber of an indefinite or extreme length such as found naturally in silk. Man-made fibers are extruded into filaments which are converted into filament yarn, staple, or tow.

Filament Yarn: A yarn composed of continuous filaments assembled with or without twist.

Filling: In a woven fabric, the yarn running from selvage to selvage at right angles to the warp. Each crosswise length is called a pick. In the weaving process, the filling yarn is carried by the shuttle or other type of yarn carrier.

Finishing: All the processes through which fabric is passed after bleaching, dyeing, or printing in preparation for the market or use. Finishing includes such operations as heat-setting, napping, embossing, pressing, calendering, and the application of chemicals which change the character of the fabric. The term finishing is also sometimes used to refer collectively to all processing operations above, including bleaching, dyeing, printing, etc.

Flame Retardant: A chemical compound which can be incorporated into a textile fiber during manufacture or applied to a fiber, fabric, or other textile item during processing for use to reduce its flammability.