单词	butylene
释义	butylene noun bu·​tyl·​ene ˈbyü-tə-ˌlēn  : any of three isomeric hydrocarbons C4H8 of the ethylene series obtained usually by cracking petroleum Example Sentences Recent Examples on the Web In addition to the 2% salicylic acid, this liquid leave-on exfoliant has a refreshingly short list of ingredients, including moisturizing butylene glycol and calming green tea extract. Sarah Jacoby, SELF, 22 Apr. 2020 Word History First Known Use 1851, in the meaning defined above Medical Definition butylene noun bu·​tyl·​ene ˈbyüt-ᵊl-ˌēn  : any of three isomeric hydrocarbons C4H8 of the ethylene series obtained usually by cracking petroleum
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