petro-, petr-, petri-, peter-

The art or process of carving upon rocks.

A systematic description of the texture of rocks and the minerals they contain, often using microscopy of thin slices of the rock to determine the mineral content.

Someone who compiles descriptions and systematic classifications of rocks.

A reference to the description and classification of rocks.

Relating to the branch of petrology dealing with the description and classification of rocks; especially, by microscopic examination.

Characterized as a method for identifying minerals in thin-sections with the use of a petrographic microscope and polarized light.

1. The scientific description of the composition and formation of rocks; descriptive petrology.
2. That department of science which investigates the constitution of rocks; petrology.
3. The systematic classification of igneous and metamorphic rocks on the basis of their mineralogical and textural relationships; especially, by means of microscopic studies.

1. A British term for gasoline (gas) for motor-driven vehicles.
2. A volatile flammable mixture of hydrocarbons (hexane and heptane, octane, etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines.
3. Etymology: "gasoline" from French pétrol (1892); earlier used (1585) in reference to the unrefined substance, from Middle French petrole, "petroleum"; from Old French; from Modern Latin petroleum.

A translucent, oily, semisolid, amorphous, yellowish or whitish mass obtained from petroleum and used as a lubricant, as a rust preventive, and in cosmetics and medicine.

Abounding in or containing petroleum.

A naturally occurring liquid mixture of complex hydrocarbon compounds that yields combustible fuels, petrochemicals, and lubricants upon distillation; usually found in deposits beneath the earth's surface and thought to have originated from plant and animal remains of the geologic past.

It is by far the most widely used fuel source in the industrialized world and is also used in many industrial products; such as, plastics, synthetic fibers, and drugs.