[1] : The Collaborative International Dictionary of English v.0.48

formula \for"mula\, n.; pl. e. formulas, l. formulae.
   l., dim. of forma form, model. seeform, 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.
      1913 webster

   2. eccl. a written confession of faith; a formal statement
      of foctrines.
      1913 webster

   3. math. a rule or principle expressed in algebraic
      language; as, the binominal formula.
      1913 webster

   4. med. a prescription or recipe for the preparation of a
      medicinal compound.
      1913 webster

   5. chem. a symbolic expression by means of letters,
      figures, etc. of the constituents or constitution of a
      compound.
      1913 webster

   note: chemical formulae 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.
         1913 webster

   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.
      1913 webster
see also:
formulas formulae form empirical formula c2h4o2 graphic formula 
rational formula ch3.c:o.oh structural formula constitutional formula benzene nucleus 
benzene molecular formula 

[2] : The Collaborative International Dictionary of English v.0.48

structural formula \struc"tural form"ula\ chem.
   a symbolic representation of the structure of one molecule of
   a chemical compound, showing the attachments of the atoms to
   each other, and representing their arrangement in space; the
   spatial representation is symbolic and approximate, and it
   may or may not depict the stereochemical relations of the
   bonds. distinguished from empirical formula. see also
   rational formula, under formula.
   pjc
see also:
empirical formula rational formula formula 

[3] : WordNet (r) 2.0

structural formula
     n : an expanded molecular formula showing the arrangement of
         atoms within the molecule

Structural >> S Words
Structural, definition of term: Structural
structural_pag1.html

Formula >> F Words
Formula, definition of term: Formula
formula_pag1.html

Structural Form >> S Words
Structural Form, definition of term: Structural Form
structural+form_pag1.html

Kekule Formula >> K Words
Kekule Formula, definition of term: Kekule Formula
kekule+formula_pag1.html