Definitions for "Solid fuel"
Solid fuel rockets are combustion-chamber tubes packed with a solid-form propellant that contains both fuel and oxidizer.
Solid fuel usually refers to blocks of solid chemical fuel for stoves, such as trioxane, hexamine, or Esbit blocks. The term can also include wood. More information: stoves
Heating fuel, normally coal, coke or one of a variety of proprietary fuels.