- of or relating to petroleum or the petroleum industry.
- the federally owned petroleum industry.
- a combining form meaning “rock,” “stone,” used in the formation of compound words: petrology.
- a combining form meaning “petroleum,” “the extraction and export of petroleum,” used in the formation of compound words: petrochemistry; petropower.
- indicating stone or rock
- indicating petroleum, its products, etc
- of or relating to a petroleum-producing country
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