Index
noun, の adjective
You search then pull items from the index. Best way to search, since it gives you a clear idea of what's going on on a large scale.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. Just think of the first part of the word index (いん). Where do you search? In the index.
英語索引も付けた方がいいんじゃないかな。
We should make an English index too.