from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Of or pertaining to the formation of rock
  • adj. Produced by the incomplete combustion of petroleum

from The Century Dictionary and Cyclopedia

  • In geology, relating to the origin of rocks in general or of special masses.


Ancient Greek πέτρος (petros, "rock") + -genic (Wiktionary)
petrol + -genic (Wiktionary)


Sorry, no example sentences found.

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