polyethylene terephthalate
Concise Oxford English Dictionary © 2008 Oxford University Press:
polyethylene terephthalate /ˌtɛrəfˈθaleɪt/
▶noun a synthetic resin made from ethylene glycol and terephthalic acid, used to make polyester fibre.
'polyethylene terephthalate' also found in these Oxford entries:

