magneto

/mæg'ni:tou/
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magneto

The mechanic tests the magneto on the small engine.

Definition

Noun: A magneto is a small electrical generator that uses permanent magnets to produce a high-voltage electric current. Its primary historical use was to create the spark needed to ignite the fuel-air mixture in the combustion chamber of some early gasoline engines, particularly in vehicles without a battery system.

Usage

The term "magneto" specifically refers to this type of self-contained ignition generator. It is used when discussing the components and history of internal combustion engines. * The vintage motorcycle's engine relied on a magneto for ignition instead of a modern coil and battery system. * To check the engine's spark, the mechanic tested the output of the magneto.

Advanced Usage
  • "Magneto ignition": A complete ignition system that uses a magneto as its source of electrical power.
    • Aircraft piston engines often use magneto ignition for its reliability.
  • In a technical context, a magneto can be described by its type, such as a flywheel magneto or a rotating-armature magneto.
Variants and Related Words
  • Magnetoelectric (adj): Relating to or involving both magnetic and electric phenomena or properties. (Note: This is a broader technical term, not a direct variant of "magneto").
  • Magneto- (prefix): A combining form meaning "magnetic," used in scientific terms (e.g., magnetosphere, magnetometer). These are distinct compound words.
Synonyms
  • Ignition magneto: A more specific term.
  • High-tension magneto: Emphasizes its voltage-producing function.
Related Terms (Not Synonyms)
  • Dynamo: A general term for an electrical generator, which a magneto is a specific type of.
  • Alternator: A generator that produces alternating current (AC), commonly used in modern vehicles to charge the battery.
  • Ignition coil: A modern component that transforms low battery voltage to high voltage for spark plugs, but requires an external power source, unlike a self-generating magneto.
magneto

The mechanic tests the magneto on the small engine.

Noun
  1. 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

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