English
indexical
From index + -ical.
A compound of index + -ical
Proto-Indo-European *deyḱ- ‘to point out’
Proto-Indo-European *déyḱeti ‘to be pointing out’
Proto-Italic *deikō ‘to show’
Latin dīcō ‘to say, indicate’
Latin index ‘discoverer, informer; forefinger’
English index
Today it means
adj Of, pertaining to, or like, an index; having the form of an index.
Language periods are conventional ranges, not dates for this word.
Etymograph / indexical