Etymology

conchoidal

C3O1N1C3H4O1I1D2A1L1

Today it means: Of or pertaining to a conchoid; that may be defined as a conchoid. Full definition →

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

  1. Englishconchoid
  2. Proto-Indo-European*h₂el-
  3. Proto-Indo-European*h₂élisder.?
  4. English todayconchoidal

From conchoid + -al.

Etymology from Wiktionary, CC BY-SA 4.0.