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compression ignition

noun
  1. ignition of engine fuel by the heat of air compressed in the cylinders into which the fuel is introduced.
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Origin of compression ignition

First recorded in 1925–30
Related formscom·pres·sion-ig·ni·tion, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018