Etymology

bilineal

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Today it means: Tracing descent through both the patriline and the matriline. Full definition →

English lineal ← Latin bi- ← Proto-Italic *dwi-
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The story

  1. Proto-Indo-European*dwóh₁
  2. Proto-Indo-European*dwi-
  3. Proto-Italic*dwi-
  4. Latinbi-
  5. Englishbi-
  6. Englishlineal
  7. English todaybilineal

From bi- + lineal.

Etymology from Wiktionary, CC BY-SA 4.0.