petrochemical -
Of or pertaining to the such compounds, or the industry that produces them.
Wikipedia
Petrochemicals are chemical products derived from petroleum. Some chemical compounds made from petroleum are also obtained from other fossil fuels such as coal or natural gas, or renewable sources such as corn or sugar cane. This article focuses on organic compounds that are not burned as fuel.
OmegaWiki Dictionary
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petrochemical Chemicals manufactured from the products of oil refineries, based largely on ethylene, propylene and butylene produced in the cracking of petrol fractions.
