structural formula

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A chemical formula that shows how the atoms and bonds in a molecule are arranged.

from the GNU version of the Collaborative International Dictionary of English.

• (Chem.) a symbolic representation of the structure of one molecule of a chemical compound, showing the attachments of the atoms to each other, and representing their arrangement in space; the spatial representation is symbolic and approximate, and it may or may not depict the stereochemical relations of the bonds. Distinguished from empirical formula. See also Rational formula, under formula.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun chemistry Any of various diagrammatic representations of the structure of a molecule that shows how its atoms are linked to each other, with what type of bonds, and the presence of any charges

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an expanded molecular formula showing the arrangement of atoms within the molecule