/pol'ee yoor"euh thayn', -yoo reth"ayn/ , n. Chem.
a thermoplastic polymer containing the group NHCOO: used for padding and insulation in furniture, clothing, and packaging, and in the manufacture of resins for adhesives, elastomers, and fillers.
Also, polyurethan /pol'ee yoor"euh than'/ .
[ 1940-45; POLY- + URETHANE ]