This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. That which emits something.

n. The name for one terminal of a bipolar transistor (BJT).

n. the electrode in a transistor where electrons originate

"Another tiny emitter is embedded in an airtight void within a Spalding "Infusion" basketball."

electrode   

Ritter    Sitter    aglitter    bitter    chitter    critter    embitter    fitter    fritter    gitter   

transceiver    detector    diode    transmitter    sampler    phosphide    relay    projector    semiconductor    collider