Etymology

midbrain

M3I1D2B3R1A1I1N1

Today it means: A part of the brain located rostral to the pons and caudal to the thalamus and the basal ganglia, composed of the tectum (dorsal portion) and the tegmentum (ventral portion). Full definition →

English brain ← Middle English brayn ← Old English bræġn
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The story

  1. Proto-Indo-European*me
  2. Proto-Indo-European*dʰeh₁-?
  3. Proto-Indo-European*médʰi
  4. Proto-Indo-European*médʰyos
  5. Proto-Germanic*midjaz
  6. Proto-West Germanic*midi
  7. Old Englishmidd
  8. Middle Englishmid
  9. Englishmid
  10. Englishmid-
  11. Proto-Indo-European*mregʰ-
  12. Proto-Indo-European*mrógʰ-n̥ ~ *mrégʰ-n̥-s
  13. Proto-Germanic*bragną
  14. Proto-West Germanic*bragn
  15. Old Englishbræġn
  16. Middle Englishbrayn
  17. Englishbrain
  18. English todaymidbrain

From mid- + brain.

Etymology from Wiktionary, CC BY-SA 4.0.