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Definition of petro- combining form from the Oxford Advanced American Dictionary

     

    petro-

     combining form
    combining form
    NAmE//ˈpɛtroʊ//
     
    (in nouns, adjectives, and adverbs)
     
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  1. 1connected with rocks petrology
  2. 2connected with gas petrochemical
See petro- in the Oxford Advanced Learner's Dictionary
Check pronunciation: petro-

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