Etymology

ultrasound

U1L1T1R1A1S1O1U1N1D2

Today it means: Sound with a frequency greater than the upper limit of human hearing, which is approximately 20 kilohertz. Full definition →

English sound ← Latin ultrā ← Proto-Indo-European *h₂el-
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The story

  1. Proto-Indo-European*h₂el-
  2. Latinūls
  3. Latinultrā
  4. Englishultra-
  5. Englishsound
  6. English todayultrasound

From ultra- + sound.

Etymology from Wiktionary, CC BY-SA 4.0.