1. Plural of butylene; unsaturated hydrocarbons with four carbon atoms and one double bond, used in the production of plastics, synthetic rubber, and other chemicals.
Usage: chemistry; technical term; plural form

Examples

• Butylenes are important feedstocks in the petrochemical industry.
• The refinery produces butylenes as a byproduct of crude oil processing.
• Butylenes can be polymerized to create various types of plastics.
• Different isomers of butylenes have distinct chemical properties.
• Industrial synthesis of butylenes often involves catalytic processes.