index

[ˈɪndɛks]
n
an alphabetical list of persons, places, subjects, etc, mentioned in the text of a printed work, usually at the back, and indicating where in the work they are referred to
See thumb index
a systematic list of book titles or author's names, giving cross-references and the location of each book; catalogue
an indication, sign, or token
a pointer, needle, or other indicator, as on an instrument
another name for exponent.a number or variable placed as a superscript to the left of a radical sign indicating by its value the root to be extracted, as in ³√8 = 2.a subscript or superscript to the right of a variable to express a set of variables, as in using x&-{i} for x&-{1}, x&-{2}, x&-{3}, etc
a numerical scale by means of which variables, such as levels of the cost of living, can be compared with each other or with some base number
a number or ratio indicating a specific characteristic, property, etc
refractive index
Also called: fist a printer's mark (☛) used to indicate notes, paragraphs, etc
a table of contents or preface
vb
to put an index in (a book)
to enter (a word, item, etc) in an index
to point out; indicate
to index-link
to move (a machine or a workpiece held in a machine tool) so that one particular operation will be repeated at certain defined intervals