Definition of petro- in English:


Syllabification: petro-

combining form

  • 1Of rock; relating to rocks: petrography
  • 2Relating to petroleum: petrodollar


sense 1 from Greek petros 'stone', petra 'rock'; sense 2 from petroleum.

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Word of the day maelstrom
Pronunciation: ˈmeɪlstrəm
a powerful whirlpool in the sea