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It is not only important, but, in a degree necessary, that the people of this country, should have an American Dictionary of the English language; for, although the body of the language is the same as in England, and it is desirable to perpetuate that sameness, yet some differences must exist. Language is the expression of ideas; and if the people of one country cannot preserve an identity of ideas, they cannot retain an identity of language. |
IN'DEX, n. plu. indexes, sometimes indices. [L. connected with idico, to show; in and dico.]
Index expurgatory, in catholic countries, a catalogue of prohibited books.
That which points out; that which shows,
indicates, manifests, or discloses.
Tastes are the indexes of the different qualities of plants. Arbuthnot. 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 [*] used to direct particular
attention to a note or paragraph; -- called also
fist.
A table for facilitating reference to
topics, names, and the like, in a book; -- usually alphabetical in
arrangement, and printed at the end of the volume.
A prologue indicating what follows.
[Obs.] Shak. The second digit, that next
to the pollex, in the manus, or hand; the forefinger; index
finger.
The figure or letter which
shows the power or root of a quantity; the exponent.
[In this
sense the plural is always indices.]
Index error, the error in the reading of a mathematical instrument arising from the zero of the index not being in complete adjustment with that of the limb, or with its theoretically perfect position in the instrument; a correction to be applied to the instrument readings equal to the error of the zero adjustment. -- Index expurgatorius. [L.] See Index prohibitorius (below). -- Index finger. See Index, 5. -- Index glass, the mirror on the index of a quadrant, sextant, etc. -- Index hand, the pointer or hand of a clock, watch, or other registering machine; a hand that points to something. -- Index of a logarithm (Math.), the integral part of the logarithm, and always one less than the number of integral figures in the given number. It is also called the characteristic. -- Index of refraction, or Refractive index (Opt.), the number which expresses the ratio of the sine of the angle of incidence to the sine of the angle of refraction. Thus the index of refraction for sulphur is 2, because, when light passes out of air into sulphur, the sine of the angle of incidence is double the sine of the angle of refraction. -- Index plate, a graduated circular plate, or one with circular rows of holes differently spaced; used in machines for graduating circles, cutting gear teeth, etc. -- Index prohibitorius [L.], or Prohibitory index (R. C. Ch.), a catalogue of books which are forbidden by the church to be read; the index expurgatorius [L.], or expurgatory index, is a catalogue of books from which passages marked as against faith or morals must be removed before Catholics can read them. These catalogues are published with additions, from time to time, by the Congregation of the Index, composed of cardinals, theologians, etc., under the sanction of the pope. Hook. -- Index rerum [L.], a tabulated and alphabetized notebook, for systematic preservation of items, quotations, etc. To provide with an index or table of
references] to put into an index; as, to index a book, or its
contents.
The ratio, or formula
expressing the ratio, of one dimension of a thing to another
dimension; as, the vertical index of the cranium.
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