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Hesselman engine

[hes-uh l-muh n] /ˈhɛs əl mən/
noun
1.
a low-compression oil engine requiring a spark for ignition.
Origin
after Swedish engineer Knut Jonas Elias Hesselman (1877-1957), its inventor
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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