1. a chemical substance obtained from petroleum or natural gas

1. relating to or derived from petroleum or natural gas

Examples

• The factory produces petrochemicals used in making plastics.
• Ethylene is an important petrochemical in the manufacturing industry.
• The petrochemical industry has grown rapidly over the past century.
• Many everyday products contain petrochemical compounds.
• The company specializes in petrochemical research and development.
• Petrochemical plants require strict safety regulations.
• The petrochemical sector contributes significantly to the economy.