olefin

/หˆษ™สŠlษ™fษชn/

IPA: /OW1 L AH0 F IH0 N/

noun
  1. 1

    Any of a class of unsaturated open-chain hydrocarbons such as ethylene; an alkene with only one carbon-carbon double bond.

Source: https://en.wiktionary.org/wiki/olefin