An index, list, catalogue, or calendar, esp. as a finding aid. In later use: spec. a book used in homeopathy, comprising a list of symptoms and…

An index, analytical table of contents.

An alphabetical list, placed (usually) at the end of a book, of the names, subjects, etc. occurring in it, with indication of the places in which…

(usually with plural agreement) (originally) a section of a book, typically containing an index or other reference material, which has been…

a list of the words used by a given author, or occurring in a given work (or corpus), usually with references to the passages in which they occur…

a reference-index consisting of grooves cut in the front edges of the leaves, or formerly of projecting tabs, or margins so cut as to show…

= thumb-index n.