Etymology

sinoatrial

S1I1N1O1A1T1R1I1A1L1

Today it means: Relating to the venous sinus and the right atrium of the heart. Full definition →

English atrial ← Proto-Indo-European *h₂élisder.?
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The story

  1. Englishsino-
  2. Englishatrium
  3. Proto-Indo-European*h₂el-
  4. Proto-Indo-European*h₂élisder.?
  5. Englishatrial
  6. English todaysinoatrial

From sino- + atrial.

Etymology from Wiktionary, CC BY-SA 4.0.