antiknock

adjective

an·​ti·​knock ˌan-tē-ˈnäk How to pronounce antiknock (audio)
ˌan-tī-
variants or anti-knock
: serving or intended to prevent detonation in the combustion process of an internal-combustion engine
an antiknock agent
an anti-knock fuel additive

Word History

First Known Use

1921, in the meaning defined above

Time Traveler
The first known use of antiknock was in 1921

Dictionary Entries Near antiknock

Cite this Entry

“Antiknock.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antiknock. Accessed 23 Mar. 2023.

Kids Definition

antiknock

noun
an·​ti·​knock
ˌant-i-ˈnäk,
ˌan-ˌtī-
: a substance that is added to the fuel of an internal combustion engine to help prevent knocking
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