I've heard both plural forms of index, indices and indexes. I usually use indices when referring to the computer science term for database index, but I'm not sure if it is correct in that context.
Are both indices and indexes correct? If only one of them is correct, which one?
Answer
Both are correct, though there are some specific usages as pointed in another answer; Google Ngrams suggests that indices is slightly more used than indexes.
For American English we have (in both charts, indices is blue and indexes is red):
For British English we have:
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