دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a substance, such as tetraethyl lead or other compounds, added to the fuel of an internal-combustion engine to prevent detonation of the fuel. Antiknock compounds effectively raise the octane rating of a fuel so that it burns properly in the combustion chamber of an engine. See octane rating, tetraethyl lead.

n: the measurement of how well an automotive gasoline resists detonation or pinging in a spark-ignition engine.

abbr: antilogarithm.

n: a second number whose logarithm is the first number. See logarithm.