copolyester
nounEtymology From co- + polyester.
1
A polyester that has been modified by the addition of other chemicals.
- Last month, Nalgene introduced a line of bottles made from a relatively new plastic from the Eastman Chemical Company, Tritan copolyester, that shares most of polycarbonate’s properties, including shatter-resistance, but is made without the chemical.2008 April 18, Ian Austen, “Bottle Maker to Stop Using Plastic Linked to Health Concerns”, in New York Times: