polycrystalline polycarboxylate polyfluorinated polynucleotides polygalacturonase polymorphonuclear polyamorous polyandrous polychaetes polycistron polydentate polyglactin polyketides polykleitos polylactide polymerized polypectomy polypyrrole polysynlane polysarcosine polycistronic polysiloxanes polyunwrapper polyoxyethylene polynomials polycondensation polyisocyanurate polymersource polymorphisms polyoxymethylene polyaspartic polybutadine polycarbonat polydopamine polyglycerol polymorphous polymyositis polynomially polypropylen polyribosome polyropylene polyrotaxane polysilazane polysiloxane polysyllabic polytheistic polyhydramnios polylithionite polymerisation polymerization