law of definite proportions(redirected from Law of definite composition)
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Related to Law of definite composition: law of multiple proportions, law of definite proportions, law of conservation of mass, Law of constant composition
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|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"