Definition of isobutylene in US English:

isobutylene

noun

Chemistry
  • An easily liquefied hydrocarbon gas, (CH₃)₂C=CH₂, used in the making of butyl rubber.

    • ‘Electrophilic addition of the t-butyl cation to isobutylene completes the process and regenerates the t-butyl cation.’

Pronunciation

isobutylene

/ˌīsəˈbyo͞odlˌēn/