SEMIDIESEL
Sem`i-Die"sel, a.
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition