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formulae n. 公式,规则,客套话 公式,规则,客套话 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]
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