Thesaurus: semi-diesel

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1. Designating an internal-combustion engine of a type resembling the Diesel engine in using as fuel heavy oil which is injected in a spray just before the end of the compression stroke and is fired without electrical ignition. The fuel is sprayed into an iron box (called a hot bulb or hot pot) opening into the combustion chamber, and heated for ignition by a blast-lamp until the engine is running, when it is, ordinarily, kept red hot by the heat of combustion.
2. Designating an internal-combustion engine of a type resemblingthe Diesel engine in using as fuel heavy oil which is injected in aspray just before the end of the compression stroke and is firedwithout electrical ignition. The fuel is sprayed into an iron box(called a hot bulb or hot pot) opening into the combustion chamber,and heated for ignition by a blast-lamp until the engine is running,when it is, ordinarily, kept red hot by the heat of combustion.