emitter

American  

[ih-mit-er] / ɪˈmɪt ər /

noun

1. a person or thing that emits.

2. Electronics. an electrode on a transistor from which a flow of electrons or holes enters the region between the electrodes.

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emitter British  

/ ɪˈmɪtə /

noun

1. a person or thing that emits

2. a radioactive substance that emits radiation

   a beta emitter

3. the region in a transistor in which the charge-carrying holes or electrons originate

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Etymology

Origin of emitter

First recorded in 1880–85; emit + -er ¹