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Longman Dictionary of Contemporary English
solid fuel
noun
EXAMPLES FROM CORPUS
▪ Apart from the trophy the winner receives £60, a tankard and a voucher for £35 for solid fuel.
▪ Do you have room to store oil or solid fuel or wood?
▪ I found a plumber, but when he saw the solid fuel monster in the kitchen, he paled visibly.
▪ It fits into standard fireplace alcoves and runs on solid fuel.
▪ Others For any advice on solid fuel, dial 100 and ask for Freefone Real Fires.
▪ Starchaser recently launched its two-stage solid fuel Starchaser Discovery rocket.
▪ The boiler, situated in the cellar, is hand-fired using solid fuel.
▪ Whether, you're burning solid fuel, gas, or electricity, there's a fireplace for you.
Wikipedia
Solid fuel

Solid fuel refers to various types of solid material that are used as fuel to produce energy and provide heating, usually released through combustion. Solid fuels include wood (see wood fuel), charcoal, peat, coal, Hexamine fuel tablets, and pellets made from wood (see wood pellets), corn, wheat, rye and other grains. Solid-fuel rocket technology also uses solid fuel (see solid propellants).

Solid fuels have been used by humanity for many years to create fire. Coal was the fuel source which enabled the industrial revolution, from firing furnaces, to running steam engines. Wood was also extensively used to run steam locomotives. Both peat and coal are still used in electricity generation today.

The use of some solid fuels (e.g. coal) is restricted or prohibited in some urban areas, due to unsafe levels of toxic emissions. The use of other solid fuels such as wood is increasing as heating technology and the availability of good quality fuel improves. In some areas, smokeless coal is often the only solid fuel used. In Ireland, peat briquettes are used for home heating. They are also used to start a coal fire.

Solid fuels are contrasted with liquid fuels and gaseous fuels.

Usage examples of "solid fuel".

Once its solid fuel motor burned out, it would pursue a ballistic trajectory into the ground and explode.

In normal missiles fuelled by lox and kerosene, the flight could be stopped simply by sending out a radio message that automatically cut off the fuel supply: but there was no way of shutting off a solid fuel already in combustion.

Now, instead of spraying kerosene into that tube, we can line part of the tube with solid fuel.

Potassium perchlorate plus a petroleum product (a solid fuel rocket) has an EJV of about 2.

And we have to face the fact that there was evidence of potential problems on earlier VB tests, with solid fuel burns inducing destabilizing oscillations.

Each missile's solid fuel propellant drove it toward the selected target at better than Mach 3.

Drag had slowed it to subsonic velocity immediately after launch, but its solid fuel motor slammed it past the sound barrier as it homed on die Aegis cruiser's radar.