Petro- Definition
petrō, petrə
prefix
Rock; stone.
Petroglyph.
American Heritage
Petroleum.
Petrochemistry.
American Heritage
affix
Rock or stone.
Petrography.
Webster's New World
Petroleum.
Petrochemical.
Webster's New World
Of or relating to the petroleum business.
Petrodollars, petropolitics.
Webster's New World
Origin of Petro-
-
Greek from petros stone per-2 in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
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