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preignition
pre·ig·ni·tion [ pr ig nísh'n ]


noun 
Definition:
 
fuel ignition before generation of spark: ignition of fuel in an internal-combustion engine before the spark has been generated, causing inefficient operation. Preignition may be caused by a hot spot in the cylinder.

pre·ig·nite transitive and intransitive verb
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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