autoignition

[ aw-toh-ig-nish-uh n ]
/ ˌɔ toʊ ɪgˈnɪʃ ən /

noun

Automotive. the spontaneous ignition of fuel when introduced into the combustion chamber of an internal-combustion engine, as a result either of glowing carbon in the chamber or of the heat of compression.

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earnest

Origin of autoignition

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020