Word.ws English Dictionary

index cases

index cases is the plural of index case.

Meaning of index case

Noun

index case (plural index cases)

  1. The first documented case in a disease epidemic within a population or the first case of interest in an epidemiological investigation: the case of patient zero (the index patient).

Questions about index cases

What is index cases the plural of?
Index cases is the plural of index case.

Words near index cases in the dictionary

  1. indews
  2. index
  3. index card
  4. index cards
  5. index case
  6. index cases
  7. index digit
  8. index digits
  9. index finger
  10. index fingers
  11. index fossil

Source and license

Adapted from Wiktionary: index cases (page history and authors); index case (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “index cases.” Word.ws, https://word.ws/index_cases. Based on Wiktionary, CC BY-SA 4.0.