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|(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.|
|(Chem.)||See under Formula.|
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.