Source : Webster's Revised Unabridged Dictionary (1913)

Index \In"dex\, n.; pl. E. {Indexes}, L. {Indices}(?). [L.: cf.
   F. index. See {Indicate}, {Diction}.]
   1. That which points out; that which shows, indicates,
      manifests, or discloses.

            Tastes are the indexes of the different qualities of
            plants.                               --Arbuthnot.

   2. That which guides, points out, informs, or directs; a
      pointer or a hand that directs to anything, as the hand of
      a watch, a movable finger on a gauge, scale, or other
      graduated instrument. In printing, a sign [[hand]] used to
      direct particular attention to a note or paragraph; --
      called also {fist}.

Indices \In"di*ces\, n. pl.
   See {Index}.

Source : WordNet®

index
     n 1: a numerical scale used to compare variables with one another
          or with some reference number
     2: 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 [syn: {index number},
         {indicant}, {indicator}]
     3: a mathematical notation indicating the number of times a
        quantity is multiplied by itself [syn: {exponent}, {power}]
     4: an alphabetical listing of names and topics along with page
        numbers where they are discussed
     5: the finger next to the thumb [syn: {index finger}, {forefinger}]
     [also: {indices} (pl)]

index
     v 1: list in an index
     2: provide with an index; "index the book"
     3: adjust through indexation; "The government indexes wages and
        prices"
     [also: {indices} (pl)]

indices
     See {index}

Source : Free On-Line Dictionary of Computing

indices
     
         A plural of "{index}".