> as lemmas
polyisocyanurate
polyisocyanurate n. 
/ˌpɒlɪʌɪsə(ʊ)sʌɪəˈnjʊərət/, /ˌpɒlɪʌɪsə(ʊ)sʌɪəˈnjɔːreɪt/, /ˌpɒlɪʌɪsə(ʊ)sʌɪəˈnjɔːrət/, /ˌpɑliˌaɪsoʊˌsaɪəˈn(j)ʊrət/ a polymer of cyanuric acid (a cyclic molecule with the formula (CHNO)3), spec. as used for insulation purposes and as a fire retardant in a formulation which sets as rigid foam.
Brit. /ˌpɒlɪʌɪsə(ʊ)sʌɪəˈnjʊəreɪt/
, /ˌpɒlɪʌɪsə(ʊ)sʌɪəˈnjʊəreɪt//ˌpɒlɪʌɪsə(ʊ)sʌɪəˈnjʊərət//ˌpɒlɪʌɪsə(ʊ)sʌɪəˈnjɔːreɪt//ˌpɒlɪʌɪsə(ʊ)sʌɪəˈnjɔːrət/U.S. /ˌpɑliˌaɪsoʊˌsaɪəˈn(j)ʊˌreɪt/
, /ˌpɑliˌaɪsoʊˌsaɪəˈn(j)ʊˌreɪt//ˌpɑliˌaɪsoʊˌsaɪəˈn(j)ʊrət/ΚΠ
1972 Analyt. Chem. 44 183 (table) Polymer... Polyisocyanurate-modified polyurethane.
2002 Build It Nov. 88/2 Celotex insulation is made from polyisocyanurate (PiR) foam, which offers exceptional low thermal conductivity and reduced flammability, when compared to other cellular plastics.
<
as lemmas