Etymology

milliarcsecond

M3I1L1L1I1A1R1C3S1E1C3O1N1D2

Today it means: A unit of angle equal to one thousandth of an arcsecond (used especially in astronomy) Full definition →

English arcsecond ← French milli- ← Latin mīlle
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The story

  1. Proto-Indo-European*sem-
  2. Proto-Indo-European*sm̥-
  3. Proto-Indo-European*smih₂
  4. Proto-Indo-European*ǵʰes-
  5. Proto-Indo-European*ǵʰéslom
  6. Proto-Indo-European*ǵʰéslih₂
  7. Proto-Indo-European*smih₂ǵʰéslih₂
  8. Proto-Italic*smīɣeslī
  9. Latinmīlle
  10. Frenchmilli-
  11. Englishmilli-
  12. Englisharcsecond
  13. English todaymilliarcsecond

From milli- + arcsecond.

Etymology from Wiktionary, CC BY-SA 4.0.