DictionarydiodeOne-way electrical component
noun

diode

DYE-ohd/ˈdaɪəʊd/

An electronic component that lets current flow mainly in one direction.

A diode lets current pass mainly in one direction through a circuit.

Two matching simple battery circuits demonstrate a diode's one-way conduction: a forward-facing diode allows a small bulb to glow, while the same diode reversed leaves the matching bulb dark.
Etymology

The name combines “two” with “way” and originally described a tube with two electrodes. It now names a component whose characteristic function is to conduct current mainly in one direction.

In context

IWCS13:53
pump diode that would couple into the core only.
Overview of Rare Earth Doped Fibers, Applications and Fabrication

More examples

  • This diode helps protect the circuit if the battery is connected backward.
  • Four diodes convert alternating current into direct current.
  • A light-emitting diode glows when current passes through it.

Forms

diode · diodes

Similar words

rectifier
Specifically converts alternating current to direct current, often using diodes.