polybutylene po·ly·bu·tylene US/ˌpɑˌliˈbjutʌˌlin/ uncommon noun 1. a polymer of butylene; used in lubricants and synthetic rubber Synonymspolybutene Related words Broader terms butylene WordNet 2.1 (Princeton University). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.
