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.

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
pump diode that would couple into the core only.
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.