polyurethane foam

from WordNet (r) 3.0 (2006)

polyurethane foam
    n 1: a foam made by adding water to polyurethane plastics [syn:
         {polyfoam}, {polyurethane foam}]

from The Collaborative International Dictionary of English v.0.48

Polyurethane \Pol"y*ur`eth*ane\, n. (Chem.)
   any polymer containing {[-NH.CO.O-]} linkages; such polymers
   are much used as the basis of light but rigid foams for
   packaging (

   {polyurethane foam}) and for hard coatings, as on floors.
      [PJC]