index

名词 index:

a numerical scale used to compare variables with one another or with some reference number

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

同义词：exponent, power

an alphabetical listing of names and topics along with page numbers where they are discussed

the finger next to the thumb

动词 index:

list in an index

provide with an index

adjust through indexation