type of synthetic resin or plastic made from polymers, 1944, from polymer + urethane.
Entries linking to polyurethane
polymer n.
a substance built from a large number of simple molecules of the same kind, 1855, probably from German Polymere (Berzelius, 1830), from Greek polymeres "having many parts," from polys "many" (from PIE root *pele- (1) "to fill") + meros "part" (from PIE root *(s)mer- (2) "to get a share of something").
urethane n.
1838, from French uréthane (1833), coined by Dumas, apparently from urea + ether + -ane as a generic chemical suffix.