# polyisobutene

> English word · Noun

## Definitions
1. A polymer of isobutene; butyl rubber.

## Etymology
From poly- + isobutene.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/polyisobutene