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# diode

noun (a diode, diodes)

«diode» in the English dictionary: everyday — its meanings, how the lessons use it, and examples, each with its tree on Mova.

## Everyday

1. A diode is a small electronic part that lets electric current flow in only one direction, like a one-way door. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#m1)
2. A light-emitting diode (LED) is a diode that gives out light when current passes through it. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#m2)

### In the lessons

Used in science and technology lessons about circuits: a diode in the wrong way round stops the circuit working. LEDs are in torches, screens, traffic lights and Christmas lights because they use little energy. Phrases: light-emitting diode (LED), a diode in a circuit, forward and reverse.

### Examples

- A diode lets the current go only one way. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#x1)
- We put the LED in the circuit backwards, so it did not light up. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#x2)
- Our torch uses tiny diodes instead of an old bulb. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#x3)
- The circuit diagram shows a diode as a triangle with a line. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#x4)
- LED stands for light-emitting diode. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#x5)
- The robot's eyes are two red diodes. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#x6)
- If the diode is turned round, the buzzer stops. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#x7)

### Note

Countable. Say «DY-ode». LED is said letter by letter (L-E-D) or sometimes «led». A diode is not a battery: it does not make electricity, it only controls which way it flows. Its long leg is usually the positive one.

## On Mova

- [Trees and pragmatics of «diode» in the school dictionary](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/): every meaning and example parsed by Mova, with its dependency tree and frames.
- [«diode» in the school dictionary](https://mova.elamur.ai/free/en/dictionaries/school/w/diode.html) on Mova free.