definite proportions

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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

• definite proportions, law of — ▪ chemistry       statement that every chemical compound contains fixed and constant proportions (by weight) of its constituent elements. Although many experimenters had long assumed the truth of the principle in general, the French chemist… …   Universalium

• 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

• Doctrine of definite proportions — Atomic A*tom ic, Atomical A*tom ic*al, a. [Cf. F. atomique.] 1. Of or pertaining to atoms. [1913 Webster] 2. Extremely minute; tiny. [1913 Webster] {Atomic bomb}, see {atom bomb} in the vocabulary. {Atomic philosophy}, or {Doctrine of atoms}, a… …   The Collaborative International Dictionary of English

• 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 interval. [1913 …   The Collaborative International Dictionary of English

• Definite article — 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

• Definite inflorescence — 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 — 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 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

• 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