Empirical formula
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. [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 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. [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]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • empirical formula — n a chemical formula showing the simplest ratio of elements in a compound rather than the total number of atoms in the molecule <CH2O is the empirical formula for glucose> compare MOLECULAR FORMULA * * * a chemical formula that expresses… …   Medical dictionary

  • empirical formula — n. a chemical formula which gives the composition of elements in a molecule in their lowest relative proportions but does not specify the structural arrangement or true molecular weight (Ex.: CH for benzene or acetylene) …   English World dictionary

  • Empirical formula — This article is about analytical chemistry. For observation rather than theory, see Empirical relationship. In chemistry, the empirical formula of a chemical compound is the simplest whole number ratio of atoms of each element present in a… …   Wikipedia

  • Empirical formula — Empiric Em*pir ic, Empirical Em*pir ic*al, a. 1. Pertaining to, or founded upon, experiment or experience; depending upon the observation of phenomena; versed in experiments. [1913 Webster] In philosophical language, the term empirical means… …   The Collaborative International Dictionary of English

  • empirical formula — noun Date: 1878 a chemical formula showing the simplest ratio of elements in a compound rather than the total number of atoms in the molecule < CH2O is the empirical formula for glucose > …   New Collegiate Dictionary

  • empirical formula — noun A notation indicating the ratios of the various elements present in a compound, without regard to the actual numbers. The molecular formula for ethane is CH, while the empirical formula is CH …   Wiktionary

  • empirical formula — empirinė formulė statusas T sritis chemija apibrėžtis Formulė, rodanti junginio elementų paprasčiausią kiekybinį santykį. atitikmenys: angl. empirical formula rus. эмпирическая формула …   Chemijos terminų aiškinamasis žodynas

  • empirical formula — empirinė formulė statusas T sritis fizika atitikmenys: angl. empirical formula vok. empirische Formel, f rus. эмпирическая формула, f pranc. formule empirique, f …   Fizikos terminų žodynas

  • empirical formula — Chem. a chemical formula indicating the elements of a compound and their relative proportions, as (CH2O)n. Cf. molecular formula, structural formula. [1820 30] * * * …   Universalium

  • empirical formula — noun a chemical formula showing the ratio of elements in a compound rather than the total number of atoms • Hypernyms: ↑formula, ↑chemical formula …   Useful english dictionary

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