'polyurethane foam' definitions:

Definition of 'polyurethane foam'

(from WordNet)
noun
A foam made by adding water to polyurethane plastics [syn: polyfoam, polyurethane foam]

Definition of 'polyurethane foam'

From: GCIDE
  • 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]