/nuy"lon/ , n.
1. any of a class of thermoplastic polyamides capable of extrusion when molten into fibers, sheets, etc., of extreme toughness, strength, and elasticity, synthesized by the interaction of a dicarboxylic acid with a diamine: used esp. for yarn, fabrics, and bristles, as for brushes.
2. nylons , stockings made of nylon, esp. sheer, full-length ones for women.
[ 1938; coined as a generic by the du Pont Chemical Co. as distinct from known words and having no prior meaning or use, but with the suffix -on suggesting other textile fibers such as RAYON ]