Radial engine. Mach. An engine, usually an internal-combustion engine of a certain type (the radial type) having several cylinders arranged radially like the spokes of a complete wheel. The semiradial engine has radiating cylinders on only one side of the crank shaft.
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  radial engine
       n : an internal-combustion engine having cylinders arranged
           radially around a central crankcase [syn: rotary engine]