antiknock

[an-tee-nok, an-tahy-]

an·ti·knock

[an-tee-nok, an-tahy-]
adjective
1.
noting or pertaining to a substance, as tetraethyllead or ferrocene, used as a fuel additive for an internal-combustion engine to eliminate or minimize knock.
noun
2.
such a substance added to fuel in an internal-combustion engine.

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Antiknock is always a great word to know.
So is lollapalooza. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a chattering or flighty, light-headed person.

Origin:
1920–25; anti- + knock
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To antiknock
Collins
World English Dictionary
antiknock (ˌæntɪˈnɒk)
 
n
a compound, such as lead tetraethyl, added to petrol to reduce knocking in the engine

Collins English Dictionary - Complete & Unabridged 10th Edition
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