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Meaning ofantiknockin English

antiknock

us//ˈæntɪˌnɑk//uk//ˈæntɪˌnɒk//

Definitions

Adjective
1. reducing engine knock in fuels; added to gasoline
  The gasoline contains an antiknock additive to improve performance.
Noun
1. a substance (like tetraethyl lead) preventing engine knock
  Tetraethyl lead is a common antiknock agent used in some fuels.

Base Words