thumb index編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看thumb indexthumb index — 名詞名詞1. a set of cutouts in a book's pages used for quick reference1.名詞釋義拇指索引a set of cutouts in a book's pages used for quick reference例句The dictionary has a thumb index so you can find letters quickly.