We found one dictionary that defines the word index marks:

General (1 matching dictionary)

1. index marks: Merriam-Webster

▸ Words similar to index marks ▸ Usage examples for index marks ▸ Idioms related to index marks ▸ Wikipedia articles (New!) ▸ Words that often appear near index marks ▸ Rhymes of index marks ▸ Invented words related to index marks