Law of multiple proportion


Also found in: Thesaurus, Medical, Wikipedia.
Related to Law of multiple proportion: law of conservation of mass, law of definite proportion
(Chem.) the generalization that when the same elements unite in more than one proportion, forming two or more different compounds, the higher proportions of the elements in such compounds are simple multiples of the lowest proportion, or the proportions are connected by some simple common factor; thus, iron and oxygen unite in the proportions FeO, Fe2O3, Fe3O4, in which compounds, considering the oxygen, 3 and 4 are simple multiplies of 1. Called also the Law of Dalton or Dalton's Law, from its discoverer.

See also: Multiple