any of several polymeric synthetic resins formed chiefly by condensing polyhydric alcohols with dibasic acids: used in making plastics, fibers, etc.
fabric made of these fibers
poly(mer) + ester
See polyester in American Heritage Dictionary 4
Any of numerous synthetic polymers produced chiefly by reaction of dibasic acids with dihydric alcohols and used primarily as light, strong, weather-resistant resins in boat hulls, textile fibers, adhesives, and molded parts.
A wrinkle-resistant fabric of fibers made from any of these resins.