Etymology

seropositive

S1E1R1O1P3O1S1I1T1I1V4E1

Today it means: Of blood serum, testing positive for a given pathogen, especially HIV (HIV positive). Full definition →

English positive ← Old French positif ← Latin positivus
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The story

  1. Proto-Indo-European*ser-
  2. Proto-Indo-European*sér-o-
  3. Proto-Italic*serom
  4. Latinserum
  5. Englishserum
  6. Englishsero-
  7. Proto-Indo-European*h₂ep
  8. Proto-Indo-European*h₂epó
  9. Proto-Indo-European*h₂pó
  10. Proto-Italic*po
  11. Proto-Indo-European*teḱ-
  12. Proto-Indo-European*tḱéytibf.
  13. Proto-Indo-European*tḱey-
  14. Proto-Indo-European*tḱinéti
  15. Proto-Italic*sinō
  16. Proto-Italic*pozinō
  17. Latinpōnō
  18. Latinīvus
  19. Latinpositivus
  20. Old Frenchpositif
  21. Englishpositive
  22. English todayseropositive

From sero- + positive.

Etymology from Wiktionary, CC BY-SA 4.0.