Etymology

photoacoustics

P3H4O1T1O1A1C3O1U1S1T1I1C3S1

Today it means: The emission of sound from a material illuminated by a modulated light source Full definition →

English acoustics ← Medieval Latin acousticus ← Ancient Greek ᾰ̓κουστῐκός (ăkoustĭkós)
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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. Proto-Indo-European*h₂eḱ-
  9. Proto-Indo-European*h₂ew-
  10. Proto-Indo-European*h₂ṓws
  11. Proto-Indo-European*h₂ḱh₂owsyéti
  12. Proto-Hellenic*akóuhō
  13. Ancient Greekἀκούω (akoúō)
  14. Ancient Greekᾰ̓κουστῐκός (ăkoustĭkós)
  15. Medieval Latinacousticus
  16. Englishacoustic
  17. Englishacoustics
  18. English todayphotoacoustics

From photo- + acoustics.

Etymology from Wiktionary, CC BY-SA 4.0.