law of equivalent proportions

Thesaurus

Noun

1.

law of equivalent proportions - (chemistry) law stating that the proportions in which two elements separately combine with a third element are also the proportions in which they combine together law of reciprocal proportions 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