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polyurethane
CIDE DICTIONARY
polyurethane, n.
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]
OXFORD DICTIONARY
polyurethane, n. any polymer containing the urethane group, used in adhesives, paints, plastics, rubbers, foams, etc.
For further exploring for "polyurethane" in Webster Dictionary Online