law of definite proportions(redirected from Definite composition, law of)
Also found in: Thesaurus, Medical.
Related to Definite composition, law of: law of definite proportions
Switch to new thesaurus
|Noun||1.||law 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"