#fuel__combustible__combustiblematerial  a substance that can be burned to provide heat or power; "more fuel is needed during the winter months"; "they developed alternative fuels for aircraft"
  supertype:  #substance__matter  that which has mass and occupies space; "an atom is the smallest indivisible unit of matter"
  subtype:  #biomass.fuel__biomas  plant materials and animal waste used as fuel
  subtype:  #butane  occurs in natural gas; used in the manufacture of rubber and fuels
  subtype:  #wood_coal__charcoal  a carbonaceous material obtained by heating wood or other organic matter in the absence of air
  subtype:  #coal_gas  gaseous mixture produced by distillation of bituminous coal and used for heating and lighting
     subtype:  #town_gas  (Brit) coal gas manufactured for domestic and industrial use
  subtype:  #coke  carbon fuel produced by distillation of coal
  subtype:  #diesel_oil__diesel_fuel  a heavy mineral oil used as fuel in diesel engines
     subtype:  #derv  (British) diesel oil used in cars and lorries with diesel engines (from d(iesel) e(ngine) r(oad) v(ehicle))
  subtype:  #fossil_fuel  fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content
     subtype:  #coal  fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period
        subtype:  #anthracite_coal__anthracite__hard_coal  a hard natural coal that burns slowly and gives intense heat
        subtype:  #bituminous_coal__soft_coal  rich in tarry hydrocarbons; burns readily with a smoky yellow flame
           subtype:  #cannel_coal  a bituminous coal that burns with a luminous flame
           subtype:  #sea_coal__seacoal  pulverized bituminous coal; used as a foundry facing
        subtype:  #lignite__browncoal__wood_coal  intermediate between peat and bituminous coal
           subtype:  #jet  a hard black form of lignite that takes a brilliant polish and is used in jewellery or ornamentation
        subtype:  #steam_coal__steamcoal  coal suitable for use under steam boilers
     subtype:  #natural_gas__gas  a fossil fuel in the gaseous state; used for cooking and heating homes
     subtype:  #petroleum__crude_oil__crudeoil__crude__coal_oil__rock_oil__fossil_oil  a dark oil consisting mainly of hydrocarbons
  subtype:  #fuel_oil__heating_oil  a petroleum product used for fuel
     subtype:  #gas_oil__gasoil  an oil formed through distillation of petroleum of intermediate boiling range and viscosity
  subtype:  #gasohol  a gasoline substitute consisting of 90% gasoline and 10% grain alcohol from corn
  subtype:  #gasoline__gasolene__gas__petrol  a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines
     subtype:  #leaded_gasoline  gasoline treated with a lead compound to reduce motor knocks; "combustion of leaded gasoline released lead into the air where it could cause lead poisoning"
     subtype:  #napalm  gasoline jelled with aluminum soaps; highly incendiary liquid used in fire bombs and flame throwers
     subtype:  #unleaded_gasoline  gasoline that has not been treated with a lead compound
  subtype:  #illuminant  something that can serve as a source of light
  subtype:  #kerosine__kerosene  a flammable hydrocarbon oil used as fuel in lamps and heaters
     subtype:  #paraffin_oil__paraffin  British usage
  subtype:  #methanol__methyl_alcohol__wood_alcohol__wood_spirit  a light volatile flammable poisonous liquid alcohol; used as an antifreeze and solvent and fuel and as a denaturant for ethyl alcohol
  subtype:  #peat  partially carbonized vegetable matter saturated with water; used as a fuel when dried
  subtype:  #propane  colorless gas found in natural gas and petroleum; used as a fuel
  subtype:  #red_fire__redfire  combustible material (usually salts of lithium or strontium) that burns bright red; used in flares and fireworks
  subtype:  #water_gas  a mixture of hydrogen and carbon monoxide with small amounts of other gases; made by blowing steam over hot coke or coal
  subtype:  #firewood  wood used for fuel; "they collected and cut their own firewood"
     subtype:  #cordwood  firewood cut and stacked in cords; wood sold by the cord
     subtype:  #backlog.firewood  large log at the back of a hearth fire
        subtype:  #Yule_log  large log traditionally burned at Christmas
     subtype:  #firebrand__brand  a piece of wood that has been burned or is burning
     subtype:  #pine_knot  a joint of pine wood used for fuel
  subtype:  #igniter__ignitor__lighter  a substance used to ignite or kindle a fire
     subtype:  #firelighter  (a piece of) a substance that burns easily and can be used to start a coal or coke fire
     subtype:  #tinder__kindling__touchwood__punk  material for starting a fire
     subtype:  #punk  substance that smolders when ignited; used to light fuses (especially fireworks)

No statement uses or specializes #fuel; click here to add one.