Etymology

phototube

P3H4O1T1O1T1U1B3E1

Today it means: A gas-filled electron tube that has a photosensitive cathode. Full definition →

English tube ← Middle French tube ← Latin tubus
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The story

  1. Proto-Indo-European*bʰeh₂-
  2. Proto-Indo-European*bʰéh₂os
  3. Proto-Hellenic*pʰáwos
  4. Ancient Greekφᾰ́ος (phắos)
  5. Ancient Greekφῶς (phôs)
  6. Ancient Greekφωτο- (phōto-)
  7. Englishphoto-
  8. Latintuba
  9. Latintubus
  10. Middle Frenchtube
  11. Englishtube
  12. English todayphototube

From photo- + tube.

Etymology from Wiktionary, CC BY-SA 4.0.