subindex

[ suhb-in-deks ]
/ sʌbˈɪn dɛks /

noun, plural sub·in·dex·es, sub·in·di·ces [suhb-in-duh-seez] /sʌbˈɪn dəˌsiz/.

an index to a part or subdivision of a larger category.

Origin of subindex

First recorded in 1920–25; sub- + index

British Dictionary definitions for subindex

subindex
/ (sʌbˈɪndɛks) /

noun plural -dices (-dɪˌsiːz) or -dexes

another word for subscript (def. 2)
US an index to a subcategory