Definition of "indices"
indices
/ˈɪndɪsiːz/
noun
Quotations
The dictionary’s four indices are helpful when searching terms. These are: Hanyu Pinyin System Index; Four-Corner System Index; Radical Index; and Japanese Reading System Index.
1999, Institute of Oriental Studies of the Saint-Petersburg Branch of the Russian Academy of Sciences, Manuscripta Orientalia: International Journal for Oriental Manuscript Research, volume 5, page 71 (THESA)