Etymology

postorder

P3O1S1T1O1R1D2E1R1

Today it means: Of a tree traversal, recursively visiting the left and right subtrees before the root. Full definition →

English order ← Middle English ordre ← Old French ordne
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The story

  1. Proto-Indo-European*pós
  2. Proto-Indo-European*pósti
  3. Proto-Italic*posti
  4. Old Latinposte
  5. Latinpost
  6. Englishpost-
  7. Proto-Indo-European*h₂er-
  8. Proto-Italic*ordō
  9. Latinōrdinem
  10. Old Frenchordne
  11. Middle Englishordre
  12. Englishorder
  13. English todaypostorder

From post- + order.

Etymology from Wiktionary, CC BY-SA 4.0.