The Clue
Back-of-book feature (5 letter answer)
The Answer
INDEX
Tags
Notes
The answer INDEX is uncommon, appearing about once every 450 puzzles.
Related Clues
Catalogue
Forefinger
Measure
Algebraic exponent
Back matter
Book end?
Book list
Book section
The Dow, e.g.
Encyclopedia volume
End table?
Kind of card
Librarian's aid
Needle on a dial
Reference aid
Subject listing
Textbook section
Rear of many a book
Reference-book feature
Dow Jones Average, e.g.
Definition
INDEX as a noun:
1. a numerical scale used to compare variables with one another or with some reference number
2. (index, index number, indicant, indicator) = a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time
3. (exponent, power, index) = a mathematical notation indicating the number of times a quantity is multiplied by itself
4. an alphabetical listing of names and topics along with page numbers where they are discussed
5. (index, index finger, forefinger) = the finger next to the thumb
INDEX as a verb:
1. list in an index
2. provide with an index; "index the book"
3. adjust through indexation; "The government indexes wages and prices"