01 n. A prescribed or set form; an established rule; a fixed or conventional method in which anything is to be done, arranged, or said.
pl.
Formulas, Formulæ ((#))
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1.
A prescribed or set form; an established rule; a fixed or conventional method in which anything is to be done, arranged, or said.
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2.
A written confession of faith; a formal statement of foctrines.(Eccl.)
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3.
A rule or principle expressed in algebraic language; as, the binominal formula.(Math.)
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4.
A prescription or recipe for the preparation of a medicinal compound.(Med.)
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5.
A symbolic expression (by means of letters, figures, etc.) of the constituents or constitution of a compound.(Chem.)
Phrases & compounds
Empirical formula —
an expression which gives the simple proportion of the constituents; as, the empirical formula of acetic acid is C2H4O2.
Graphic formula —
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 —
a formula indicating the supposed molecular constitution of a compound.