Etymology

ambulacrum

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Today it means: A row of pores in an echinoderm, for the protrusion of appendages such as tube feet. Full definition →

Latin ambulacrum ← Proto-Italic *alō ← Proto-Indo-European *h₂elh₂-
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The story

  1. Proto-Indo-European*h₂ent-
  2. Proto-Indo-European*h₂énts?
  3. Proto-Indo-European*h₂m̥bʰí
  4. Proto-Italic*amβi-
  5. Latinambi-
  6. Proto-Indo-European*h₂elh₂-
  7. Proto-Italic*alō
  8. Latin*alō
  9. Latinambulō
  10. Latinambulacrum
  11. English todayambulacrum

From Latin ambulacrum, from ambulō (“walk; travel”).

Etymology from Wiktionary, CC BY-SA 4.0.