Etymology

magnetron

M3A1G2N1E1T1R1O1N1

Today it means: A device in which electrons are made to resonate in a specially shaped chamber and thus produce microwave radiation; used in radar, and in microwave ovens Full definition →

English magnet ← Middle English magnete ← Latin magnēs
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The story

  1. Old Frenchmagnete
  2. Ancient GreekΜάγνης (Mágnēs)
  3. Ancient Greekμᾰ́γνης (mắgnēs)
  4. Latinmagnēs
  5. Middle Englishmagnete
  6. Englishmagnet
  7. English todaymagnetron

From magnet + -tron.

Etymology from Wiktionary, CC BY-SA 4.0.