Definition of naphtha in English:

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Pronunciation: /ˈnapTHə/ Pronunciation: /ˈnafTHə/


A flammable oil containing various hydrocarbons, obtained by the dry distillation of organic substances such as coal, shale, or petroleum.
Example sentences
  • Use a good grade of naphtha, isopropyl alcohol, or butyl cellosolve on polycarbonate domes.
  • To avoid having sodium react with oxygen or water vapor in the air, it is usually stored under kerosene, naphtha, or some other organic liquid with which it does not react.
  • The temblor and subsequent aftershocks are believed to have dislodged the cover of the tank, which was filled with 26,000 kiloliters of naphtha - a highly flammable petroleum byproduct.


Late Middle English napte, from Latin naphtha, from Greek, of Asian origin; the Latin spelling was introduced in the late 16th century.

For editors and proofreaders

Syllabification: naph·tha

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