Book lists

• Scales of charges Spain introduced for third of Catalans
• Book parts
• Catalogues
• Back-of-the-book conveniences
• Hands pointing to text in square after cubes
• Market measurements
• Signs I’d since altered

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)

WordNet Word definitions in WordNet
See index