in general, an appellation given to whatever is not certain, fixed, and limited; in which sense it is the same with indefinite.

INDEX, in Anatomy, denotes the fore-finger. It is thus called from indicus, "I point or direct;" because that finger is generally so used: whence also the extensor indicis is called indicator.

INDEX, in Arithmetic and Algebra, shows to what power any quantity is involved, and is otherwise called its exponent. See ALGEBRA.

INDEX of a Book, is that part annexed to a book, referring to the particular matter or passages therein contained.

INDEX of a Globe, is a little style fitted on to the north pole, and turning round with it, pointing to certain divisions in the hour-circle. It is sometimes also called gnomon. See GLOBE.

Expurgatory INDEX, a catalogue of prohibited books in the church of Rome.

By a bull of Clement VIII. in 1595, the use of the Scriptures in the vulgar tongue is forbidden to all persons without a particular license; and it is ordained, that no book shall be printed at Rome without the approbation of the Pope's vicar, or some person delegated by the Pope; nor in any other places, unless allowed by the bishop of the diocese, or some person deputed by him, or by the inquisitor of heretical pravity.