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Definitions

American Heritage® Dictionary of the English Language, Fourth Edition

  1. n. A device that produces alternating current for distribution to the spark plugs, used in the ignition systems of some internal-combustion engines.

Century Dictionary and Cyclopedia

  1. n. A magneto-electric machine: as, a magneto-motor.
  2. n. A combining form of magnet or magnetic, often implying especially magneto-electric. As applied to electric machines, it is used (in contradistinction to dynamo-) to indicate that the magnetic fields involved are due to permanent magnets.
  3. n. Specifically, the electric generator used as the source of the current in internal-combustion motors (the engines of motor-cars in particular) to cause the spark which ignites the combustible mixture. The magneto, which is in effect a dynamo, is driven from the motor-shaft and supplies current through a small storage battery for use in starting or before the magneto armature reaches speed. The magneto is not liable to stoppage of its current, nor to change of voltage, and the renewal of the battery-cell is eliminated. See ignition, 5, and internal-combustion motor.

Wiktionary

  1. n. a dynamo that provides power to the spark plugs of a small internal combustion engine

GNU Webster's 1913

  1. n. A small electric generator with an armature rotating in a magnetic field, having a secondary winding that generates a high voltage, such as one used to generate a voltage sufficient to cause a spark to jump between the poles of a spark plug in an internal-combustion engine.

WordNet 3.0

  1. n. a small dynamo with a secondary winding that produces a high voltage enabling a spark to jump between the poles of a spark plug in a gasoline engine

Etymologies

  1. Short for magnetoelectric machine. (American Heritage® Dictionary of the English Language, Fourth Edition)

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  • reesetee Code name for the international conference at Yalta , February 4-9, 1945.
    Jan 25, 2008

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‘magneto’ has been looked up 1444 times, loved by 1 person, added to 8 lists, commented on 1 time, and has a Scrabble score of 10.