structural formula

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formula

 [for´mu-lah] (pl. formulas, for´mulae) (L.)
1. an expression, using numbers or symbols, giving the directions for preparing a compound (such as a medicine) or giving a procedure to follow to obtain a desired result.
2. a mixture for feeding an infant, usually with cow's milk as a base, supplemented with vitamins and minerals. Various formulas are available, differing in protein, fat, and carbohydrate content in order to meet the nutritional requirements or restrictions of individual infants.
chemical formula a combination of symbols used to express the chemical components of a substance.
empirical formula a chemical formula that expresses the proportions of the elements present in a substance.
molecular formula a chemical formula expressing the number of each element present in a substance, without indicating how they are linked.
spatial formula (stereochemical formula) a chemical formula giving the numbers of atoms of each element present in a molecule of a substance, which atom is linked to which, the types of linkages involved, and the relative positions of the atoms in space.
structural formula a chemical formula showing the spatial arrangement of the atoms and the linkage of every atom.

struc·tur·al for·mu·la

a formula in which the connections of the atoms and groups of atoms, as well as their kind and number, are indicated.

struc·tur·al for·mu·la

(strŭk'shŭr-ăl fōrm'yū-lă)
A formula in which the connections of the atoms and groups of atoms, as well as their kind and number, are indicated.

formula

pl. formulae, formulas [L.] an expression, using numbers or symbols, of the composition of, or of directions for preparing, a compound, such as a medicine, or of a procedure to follow to obtain a desired result, or of a single concept.

chemical formula
a combination of symbols used to express the chemical components of a substance.
dental formula
see dental formula.
empirical formula
a chemical formula that expresses the proportions of the elements present in a substance.
gait formula
sets out the times that the feet are individually in contact with the ground while the animal is moving.
molecular formula
a chemical formula expressing the number of atoms of each element present in a substance, without indicating how they are linked.
spatial formula, stereochemical formula
a chemical formula giving the numbers of atoms of each element present in a molecule of a substance, which atom is linked to which, the types of linkages involved, and the relative positions of the atoms in space.
structural formula
a chemical formula showing the spatial arrangement of the atoms and the linkage of every atom.
vertebral formula
sets out the number of vertebrae in each of the sections of the spinal column.
References in periodicals archive ?
BEIRUT: Finance Minister Ali Hassan Khalil said Wednesday it was imperative to remove all obstacles before the endorsement of the draft budget, and that he had a constitutional formula to do so.
The opposition also called for adopting the dialogue outcome as constitutional formulas and not recommendations and wanted the participants to go beyond the political discussions to include other matters.
During the ending year, the assassinated democracy in Arab countries has suffered a direct military coup that overthrew an elected president and introduced constitutional changes for lifelong presidency; constitutional formulas that hinder free competition and keep the president in power through seemingly pluralistic elections that lack credibility; new laws that limit the action of opposing parties; emergency laws that allow military courts to look into political matters, most of which are of questionable validity; and attempts to nullify the rule of the elected majority through force and weapons.
Legal and constitutional formulas are being studied in order that economic and monetary stability should be maintained,' he said.

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