Internal-combustion engine and Radial engine

Internal-combustion engine noun - A heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine.

Radial engine and internal-combustion engine are semantically related. In some cases you can use "Radial engine" instead a noun phrase "Internal-combustion engine".

Radial engine noun - An internal-combustion engine having cylinders arranged radially around a central crankcase.

Internal-combustion engine and radial engine are semantically related. You can use "Internal-combustion engine" instead a noun phrase "Radial engine".