petro-
combining form/petrəʊ/, /petrə/, /pəˈtrɒ/
/petrəʊ/, /petrə/, /pəˈtrɑː/
in nouns, adjectives and adverbs- connected with rocks
- petrology
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- connected with petrol
- petrochemical
Word Originsense (1) from Greek petros ‘stone’, petra ‘rock’; sense (2) from petroleum.
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petro-