ANTIKNOCK

antiknock, antiknocking

(adjective) suppressing or eliminating engine knock in combustion engines; “antiknock properties”; “antiknock rating”

antiknock

(noun) any of various compounds that are added to gasoline to reduce engine knocking

Source: WordNet® 3.1

antiknock (not comparable)

Of an additive added to petroleum/gasoline to reduce the occurrence of engine knock.

antiknock (plural antiknocks)

Such a substance, usually tetraethyl lead (also MMT, MTBE and ethanol)

Source: Wiktionary

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24 February 2025

(noun) (astronomy) position of a planet as defined by its angular distance from its perihelion (as observed from the sun)

Coffee Trivia

In 1884, Angelo Moriondo of Turin, Italy, demonstrated the first working example of an espresso machine.