Etymology

tonofilament

T1O1N1O1F4I1L1A1M3E1N1T1

Today it means: A structural filament of keratin present in the cytoplasm Full definition →

English filament ← Medieval Latin fīlāmentum ← Late Latin fīlō
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The story

  1. Proto-Indo-European*ten-
  2. Proto-Indo-European*tónos
  3. Proto-Hellenic*tónos
  4. Ancient Greekτόνος (tónos)
  5. Englishtono-
  6. Proto-Indo-European*gʷʰiH-(s-)lo-
  7. Proto-Italic*fī(s)lom
  8. Latinfīlum
  9. Late Latinfīlō
  10. Medieval Latinfīlāmentum
  11. Englishfilament
  12. English todaytonofilament

From tono- + filament.

Etymology from Wiktionary, CC BY-SA 4.0.