Source : Webster's Revised Unabridged Dictionary (1913)

Formula \For"mu*la\, n.; pl. E. {Formulas}, L. {Formul[ae]}.
   [L., dim. of forma form, model. See{Form}, n.]
   1. A prescribed or set form; an established rule; a fixed or
      conventional method in which anything is to be done,
      arranged, or said.

   2. (Eccl.) A written confession of faith; a formal statement
      of foctrines.

   3. (Math.) A rule or principle expressed in algebraic
      language; as, the binominal formula.

   4. (Med.) A prescription or recipe for the preparation of a
      medicinal compound.

   5. (Chem.) A symbolic expression (by means of letters,
      figures, etc.) of the constituents or constitution of a
      compound.

   Note: Chemical formul[ae] consist of the abbreviations of the
         names of the elements, with a small figure at the lower
         right hand, to denote the number of atoms of each
         element contained.

   {Empirical formula} (Chem.), an expression which gives the
      simple proportion of the constituents; as, the empirical
      formula of acetic acid is {C2H4O2}.

   {Graphic formula}, {Rational formula} (Chem.), an expression
      of the constitution, and in a limited sense of the
      structure, of a compound, by the grouping of its atoms or
      radicals; as, a rational formula of acetic acid is
      {CH3.(C:O).OH}; -- called also {structural formula},
      {constitutional formula}, etc. See also the formula of
      {Benzene nucleus}, under {Benzene}.

   {Molecular formula} (Chem.), a formula indicating the
      supposed molecular constitution of a compound.

-graph \-graph\ (-gr[.a]f) [From Gr. gra`fein to write. See
   {Graphic}.] A suffix signifying something written, a writing;
   also, a writer; as autograph, crystograph, telegraph,
   photograph. Graphic \Graph"ic\ (gr[a^]f"[i^]k), Graphical
\Graph"ic*al\ (-[i^]*kal), a. [L. graphicus, Gr. grafiko`s, fr.
   gra`fein to write; cf. F. graphique. See {Graft}.]
   1. Of or pertaining to the arts of painting and drawing.

   2. Of or pertaining to the art of writing.

   3. Written or engraved; formed of letters or lines.

            The finger of God hath left an inscription upon all
            his works, not graphical, or composed of letters.
                                                  --Sir T.
                                                  Browne.

   4. Well delineated; clearly and vividly described.

   5. Having the faculty of, or characterized by, clear and
      impressive description; vivid; as, a graphic writer.

   {Graphic algebra}, a branch of algebra in which, the
      properties of equations are treated by the use of curves
      and straight lines.

   {Graphic arts}, a name given to those fine arts which pertain
      to the representation on a fiat surface of natural
      objects; as distinguished from music, etc., and also from
      sculpture.

   {Graphic formula}. (Chem.) See under {Formula}.

   {Graphic granite}. See under {Granite}.

   {Graphic method}, the method of scientific analysis or
      investigation, in which the relations or laws involved in
      tabular numbers are represented to the eye by means of
      curves or other figures; as the daily changes of weather
      by means of curves, the abscissas of which represent the
      hours of the day, and the ordinates the corresponding
      degrees of temperature.

   {Graphical statics} (Math.), a branch of statics, in which
      the magnitude, direction, and position of forces are
      represented by straight lines

   {Graphic tellurium}. See {Sylvanite}.>