資料來源 : 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}.