Signs I’d since altered

• Dow Jones stats
• Cookbooks have them
• Scales of charges Spain introduced for third of Catalans
• Market measurements
• Book parts
• The Dow and the Nikkei 225
• Back-of-the-book readings
• Mathematical exponents

Wiktionary Word definitions in Wiktionary
n. (en-irregular index nodot=1) (gloss: when used in the sense of a key to locate an element in a list, vector or matrix in computing or mathematics)

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Index \In"dex\, n.; pl. E. Indexes , L. Indices (?). [L.: cf. F. index. See Indicate , Diction .] That which points out; that which shows, indicates, manifests, or discloses; as, the increasing unemployment rate is an index of how much the economy has slowed. ...