Source : Webster's Revised Unabridged Dictionary (1913)

Sine \Sine\, n. [LL. sinus a sine, L. sinus bosom, used in
   translating the Ar. jaib, properly, bosom, but probably read
   by mistake (the consonants being the same) for an original
   j[=i]ba sine, from Skr. j[=i]va bowstring, chord of an arc,
   sine.] (Trig.)
      (a) The length of a perpendicular drawn from one extremity
          of an arc of a circle to the diameter drawn through
          the other extremity.
      (b) The perpendicular itself. See {Sine of angle}, below.

   {Artificial sines}, logarithms of the natural sines, or
      logarithmic sines.

   {Curve of sines}. See {Sinusoid}.

   {Natural sines}, the decimals expressing the values of the
      sines, the radius being unity.

   {Sine of an angle}, in a circle whose radius is unity, the
      sine of the arc that measures the angle; in a right-angled
      triangle, the side opposite the given angle divided by the
      hypotenuse. See {Trigonometrical function}, under
      {Function}.

   {Versed sine}, that part of the diameter between the sine and
      the arc.

Artificial \Ar`ti*fi"cial\, a. [L. artificialis, fr. artificium:
   cf. F. artificiel. See {Artifice}.]
   1. Made or contrived by art; produced or modified by human
      skill and labor, in opposition to natural; as, artificial
      heat or light, gems, salts, minerals, fountains, flowers.

            Artificial strife Lives in these touches, livelier
            than life.                            --Shak.

   2. Feigned; fictitious; assumed; affected; not genuine.
      ``Artificial tears.'' --Shak.

   3. Artful; cunning; crafty. [Obs.] --Shak.

   4. Cultivated; not indigenous; not of spontaneous growth; as,
      artificial grasses. --Gibbon.

   {Artificial arguments} (Rhet.), arguments invented by the
      speaker, in distinction from laws, authorities, and the
      like, which are called inartificial arguments or proofs.
      --Johnson.

   {Artificial classification} (Science), an arrangement based
      on superficial characters, and not expressing the true
      natural relations species; as, ``the artificial system''
      in botany, which is the same as the Linn[ae]an system.

   {Artificial horizon}. See under {Horizon}.

   {Artificial light}, any light other than that which proceeds
      from the heavenly bodies.

   {Artificial lines}, lines on a sector or scale, so contrived
      as to represent the logarithmic sines and tangents, which,
      by the help of the line of numbers, solve, with tolerable
      exactness, questions in trigonometry, navigation, etc.

   {Artificial numbers}, logarithms.

   {Artificial person} (Law). See under {Person}.

   {Artificial sines}, {tangents}, etc., the same as logarithms
      of the natural sines, tangents, etc. --Hutton.