law of definite proportions
Date: 1830 a statement in chemistry: every definite compound always contains the same elements in the same proportions by weight

New Collegiate Dictionary. 2001.

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  • Law of definite proportions — Definite Def i*nite, a. [L. definitis, p. p. of definire: cf. F. d[ e]fini. See {Define}.] 1. Having certain or distinct; determinate in extent or greatness; limited; fixed; as, definite dimensions; a definite measure; a definite period or… …   The Collaborative International Dictionary of English

  • Law of definite proportions — In chemistry, the law of definite proportions, sometimes called Proust s Law, states that a chemical compound always contains exactly the same proportion of elements by mass. An equivalent statement is the law of constant composition, which… …   Wikipedia

  • law of definite proportions — law of def·i·nite pro·por·tions def (ə )nət prə pȯr shənz n a statement in chemistry: every definite compound always contains the same elements in the same proportions by weight * * * any compound always contains the same kind of elements in the …   Medical dictionary

  • law of definite proportions — 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, ↑ …   Useful english dictionary

  • law of constant proportions — n LAW OF DEFINITE PROPORTIONS …   Medical dictionary

  • Law of multiple proportions — In chemistry, the law of multiple proportions is one of the basic laws and a major tool of chemical measurement (stoichiometry). It states that when elements combine they do so in a ratio of small whole numbers. For example, carbon and oxygen… …   Wikipedia

  • law of constant proportions — pastoviųjų santykių dėsnis statusas T sritis fizika atitikmenys: angl. law of constant proportions; law of definite composition vok. Gesetz der konstanten Gewichtsverhältnisse, n; Gesetz der konstanten Proportionen, n; Gesetz der konstanten… …   Fizikos terminų žodynas

  • law of definite composition — pastoviųjų santykių dėsnis statusas T sritis fizika atitikmenys: angl. law of constant proportions; law of definite composition vok. Gesetz der konstanten Gewichtsverhältnisse, n; Gesetz der konstanten Proportionen, n; Gesetz der konstanten… …   Fizikos terminų žodynas

  • law of definite composition — 1. Chem. the statement that in a pure compound the elements are always combined in fixed proportions by weight. 2. Logic. the law that either a proposition or its denial must be true. * * * …   Universalium

  • law of definite composition — 1. Chem. the statement that in a pure compound the elements are always combined in fixed proportions by weight. 2. Logic. the law that either a proposition or its denial must be true …   Useful english dictionary

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