polyurethane /ˌpɑliˈjɚrəˌθeɪn/ noun Learner's definition of POLYURETHANE
[noncount]
: a type of plastic that is used to make various products and especially to make a clear liquid that is spread on a surface (such as a wooden floor) and that becomes hard when it dries聚氨酯;聚氨基甲酸酯