Etymology

apsidal

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Today it means: Of, pertaining to, or in the form of an apse. Full definition →

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

  1. Englishapside
  2. Proto-Indo-European*h₂el-
  3. Proto-Indo-European*h₂élisder.?
  4. English todayapsidal

From apside + -al.

Etymology from Wiktionary, CC BY-SA 4.0.