English dictionary
semidiesel
Definitions, examples, synonyms and antonyms from WordNet 3.0.
adjective
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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 <i>hot bulb</i> or <i>hot pot</i>) 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.
Source: webster1913