Rational 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:

  • rational formula — structural f …   Medical dictionary

  • rational formula —    An equation relating runoff intensity and area to a runoff coefficient [16] …   Lexicon of Cave and Karst Terminology

  • 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]… …   The Collaborative International Dictionary of English

  • Rational trigonometry — is a recently introduced approach to trigonometry that eschews all transcendental functions (such as sine and cosine) and all proportional measurements of angles. In place of angles, it characterizes the separation between lines by a quantity… …   Wikipedia

  • Rational pricing — is the assumption in financial economics that asset prices (and hence asset pricing models) will reflect the arbitrage free price of the asset as any deviation from this price will be arbitraged away . This assumption is useful in pricing fixed… …   Wikipedia

  • Rational — Ra tion*al (r[a^]sh [u^]n*al), a. [L. rationalis: cf. F. rationnel. See {Ratio}, {Reason}, and cf. {Rationale}.] 1. Relating to the reason; not physical; mental. [1913 Webster] Moral philosophy was his chiefest end; for the rational, the natural …   The Collaborative International Dictionary of English

  • Rational horizon — Rational Ra tion*al (r[a^]sh [u^]n*al), a. [L. rationalis: cf. F. rationnel. See {Ratio}, {Reason}, and cf. {Rationale}.] 1. Relating to the reason; not physical; mental. [1913 Webster] Moral philosophy was his chiefest end; for the rational, the …   The Collaborative International Dictionary of English

  • Rational quantity — Rational Ra tion*al (r[a^]sh [u^]n*al), a. [L. rationalis: cf. F. rationnel. See {Ratio}, {Reason}, and cf. {Rationale}.] 1. Relating to the reason; not physical; mental. [1913 Webster] Moral philosophy was his chiefest end; for the rational, the …   The Collaborative International Dictionary of English

  • Rational symptom — Rational Ra tion*al (r[a^]sh [u^]n*al), a. [L. rationalis: cf. F. rationnel. See {Ratio}, {Reason}, and cf. {Rationale}.] 1. Relating to the reason; not physical; mental. [1913 Webster] Moral philosophy was his chiefest end; for the rational, the …   The Collaborative International Dictionary of English

  • Rational function — In mathematics, a rational function is any function which can be written as the ratio of two polynomial functions. DefinitionsIn the case of one variable, x , a rational function is a function of the form: f(x) = frac{P(x)}{Q(x)}where P and Q are …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”