noun
(chemistry) law stating that every pure substance always contains the same elements combined in the same proportions by weight
• Syn: ↑law of constant proportion
• Topics: ↑chemistry, ↑chemical science
• Hypernyms: ↑law, ↑law of nature
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: a statement in chemistry: every definite compound always contains the same elements in the same proportions by weight
Useful english dictionary. 2012.