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"indices" vs "indexes"

Both 'indexes' and 'indices' are correct plural forms of the word 'index'. 'Indexes' is more commonly used in American English, while 'indices' is more common in British English and in academic or technical contexts.

Last Updated: March 29, 2024

indices

This is a correct plural form of the word 'index' and is more common in British English and in academic or technical contexts.

Use 'indices' as the plural form of 'index' in British English or in academic or technical writing.

Examples:

  • The indices of the research study were carefully analyzed.
  • The book included detailed indices for each chapter.

Alternatives:

  • indexes
  • index plural
  • index forms
  • index pluralities
  • index multiples

indexes

This is a correct plural form of the word 'index' and is commonly used in American English.

Use 'indexes' as the plural form of 'index' in American English.

Examples:

  • The book contains multiple indexes for easy reference.
  • She checked the indexes at the back of the textbook for the relevant information.

Alternatives:

  • indices
  • index plural
  • index forms
  • index pluralities
  • index multiples

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