variants: or petri- or petro-

Definition of petr-

1a : stone : rock petrescent Petricola petrogenesis
b : petroleum petroporphyrins
2 : of or relating to the petrous portion of the temporal bone and petrohyoid

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History and Etymology for petr-

Middle French petr-, petri- & Latin petr- & New Latin petro-, from Greek petr-, petro-, from petros stone & petra rock

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Cite this Entry

“Petr-.” Dictionary, Merriam-Webster, Accessed 18 Apr. 2021.

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