IPA: //bjuːˈtædiːn//
KK: /bjuˈteɪdiːn/
A colorless and flammable gas that is a type of hydrocarbon, commonly used to make synthetic rubber.
Butadiene is an important chemical in the production of various types of rubber.
Butadiene is formed from "but-" (from butyric, meaning four carbon atoms) and "-diene" (from Greek "dienos", meaning two double bonds). The word refers to a hydrocarbon with four carbon atoms and two double bonds between them.
Think of 'but-' meaning four carbon atoms and '-diene' indicating two double bonds — this helps you remember that butadiene is a compound with four carbons and two double bonds.