indices
- 1Plural of index.
Stock market indices fell sharply after the central bank's announcement.
Mathematicians use indices to label the successive terms of a sequence.
Note
A Latin plural carried straight into English from indicēs, with the singular's -ex turning into -ices. English also allows the regular plural indexes. In mathematics and computing, where subscripts label terms and counting may begin at zero or at one, indices is the usual choice. For the alphabetical lists at the back of a book, both plurals appear, and indices sits comfortably beside appendices.
indices is a form of index
index, noun: An alphabetical listing of items along with the location where each one can be found. Full entry
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Origin
From Latin "indicēs".