"gasoline, refined petroleum used in motor-cars," 1895, from French pétrol (1892); earlier used (1580s) in reference to the unrefined substance, from Middle French petrole "petroleum," from Old French (13c.), from Medieval Latin petroleum (see petroleum).
petrify
petro-
petrochemical
petrodollar
petroglyph
petrol
petroleum
petroleur
petrology
Petronilla
petrous