a significant word used in indexing or cataloging | the finger next to the thumb |
a word that is used as a pattern to decode an encrypted message | an alphabetical listing of names and topics along with page numbers where they are discussed |
| 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 |
| a mathematical notation indicating the number of times a quantity is multiplied by itself |
| a numerical scale used to compare variables with one another or with some reference number |