law of definite proportions

Also found in: Thesaurus, Medical, Legal, Encyclopedia, Wikipedia.
Related to law of definite proportions: law of multiple proportions
ThesaurusAntonymsRelated WordsSynonymsLegend: of definite proportions - (chemistry) law stating that every pure substance always contains the same elements combined in the same proportions by weight
law of nature, law - a generalization that describes recurring facts or events in nature; "the laws of thermodynamics"
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions