antiknock

American  

[an-tee-nok, an-tahy-, an-tee-nok, an-tahy-] / ˌæn tiˈnɒk, ˌæn taɪ-, ˈæn tiˌnɒk, ˈæn taɪ- /

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.

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noun

1. such a substance added to fuel in an internal-combustion engine.

antiknock British  

/ ˌæntɪˈnɒk /

noun

1. a compound, such as lead tetraethyl, added to petrol to reduce knocking in the engine

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Etymology

Origin of antiknock

First recorded in 1920–25; anti- + knock

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Example Sentences

See Examples For:

antiknock

Knocking quality is measured in octane, a 100% antiknock laboratory fluid.

From Time Magazine Archive

Because methane is h'gh in antiknock value, special high-compression engines which save 15% in fuel consumption are now available for this fuel.

From Time Magazine Archive

The new fuel can be used in any car with a low-compression engine not requiring the antiknock properties of leaded gas.

From Time Magazine Archive

The refiners treat their gas with this antiknock compound, may sell the treated gas only to jobbers who are also licensed by the top company.

From Time Magazine Archive

The latest Dubbs "cracking" unit will convert 3,000 bbl. of oil per day, making 60% or more high-test antiknock motor fuel.

From Time Magazine Archive

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