Abraham Pineo Gesner in the context of George Frederic Matthew

Kerosene, or paraffin, is a combustible hydrocarbon liquid which is derived from petroleum. It is widely used as a fuel in aviation as well as households. Its name derives from the Greek κηρός (kērós) meaning "wax"; it was registered as a trademark by Nova Scotia geologist and inventor Abraham Gesner in 1854 before evolving into a generic trademark. It is sometimes spelled kerosine in scientific and industrial usage.

Kerosene is widely used to power jet engines of aircraft (jet fuel), as well as some rocket engines in a highly refined form called RP-1. It is also commonly used as a cooking and lighting fuel, and for fire toys such as poi. In parts of Asia, kerosene is sometimes used as fuel for small outboard motors or even motorcycles. World total kerosene consumption for all purposes is equivalent to about 5,500,000 barrels per day as of July 2023.

While the local use of oil goes back many centuries, the modern petroleum industry along with its outputs and modern applications are of a recent origin. Petroleum's status as a key component of politics, society, and technology has its roots in the coal and kerosene industry of the late nineteenth century. One of the earliest instances of this is the refining of paraffin from crude oil. Abraham Gesner developed a process to refine a liquid fuel (which he would later call kerosene) from coal, bitumen and oil shale; it burned more cleanly and was cheaper than whale oil. James Young in 1847 noticed a natural petroleum seepage when he distilled a light thin oil suitable for use as lamp oil, at the same time obtaining a thicker oil suitable for lubricating machinery. The world's first refineries and modern oil wells were established in the mid-nineteenth century. While petroleum industries developed in several countries during the nineteenth century, the two giants were the United States and the Russian Empire, specifically that part of it that today forms the territory of independent Azerbaijan. Together, these two countries produced 97% of the world's oil over the course of the nineteenth century.

The use of the internal combustion engine for automobiles and trucks in the turn of the twentieth century was a critical factor in the explosive growth of the industry in the United States, Europe, Middle East and later the rest of the world. When diesel fuel replaced steam engines in warships, control of oil supplies became a factor in military strategy—and played a key role in World War II. After the dominance of coal waned in the mid-1950s, oil received significant media coverage and its importance on modern economies increased greatly, being a major factor in several energy crises.