reduction

—reductional, adj.

/ri duk"sheuhn/, n.

1. the act of reducing or the state of being reduced.

2. the amount by which something is reduced or diminished.

3. a form produced by reducing; a copy on a smaller scale.

4. Cell Biol. meiosis, esp. the first meiotic cell division in which the chromosome number is reduced by half.

5. Chem. the process or result of reducing.

6. Motion Pictures. the process of making a print of a narrower gauge from a print of a wider gauge: the reduction of 35-mm films to 16-mm for the school market.

7. a village or settlement of Indians in South America established and governed by Spanish Jesuit missionaries.

[1475-85; earlier reduccion < MF reduction < L reduction- (s. of reductio) a bringing back, equiv. to reduct(us) (ptp. of reducere; see REDUCE) + -ion- -ION]

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Any of a class of chemical reactions in which the number of electrons associated with an atom or group of atoms is increased.

The electrons taken up by the substance reduced are supplied by another substance, often hydrogen (H₂), which is thereby oxidized. See also oxidation-reduction.

(as used in expressions)

reduction division

oxidation reduction

Strategic Arms Reduction Talks

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▪ chemistry

any of a class of chemical reactions in which the number of electrons associated with an atom or a group of atoms is increased. The electrons taken up by the substance reduced are supplied by another substance, which is thereby oxidized. See oxidation-reduction reaction.

▪ logic

in syllogistic, or traditional, logic, method of rearranging the terms in one or both premises of a syllogism, or argument form, to express it in a different figure; the placement of the middle, or repeated, term is altered, usually to a preferred pattern. Aristotle took as primary the first figure, in which the middle term (M) is in the pattern

S and P being the subject term and predicate term, respectively, of the conclusion; he therefore reduced syllogisms of the second, third, and fourth figures to the first figure. For example, the second figure syllogism

can be reduced to a first figure syllogism by simply converting the first premise to the equivalent “No B is A.”

The desire to perform reductions was based on the notion that only syllogisms of the first figure were self-evident. Reduction to other figures, however, could also have been chosen.

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Universalium. 2010.

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réduction — [ redyksjɔ̃ ] n. f. • fin XIIIe « rapprochement »; lat. reductio, de reducere → réduire I ♦ (XIVe) Opération qui consiste à remettre en place (un os luxé, fracturé; un organe déplacé). Réduction d une articulation luxée. Par ext. Réduction d une… … Encyclopédie Universelle
Reduction — Reduction, reduced, or reduce may refer to:cienceChemistry*Reduction – chemical reaction in which atoms have their oxidation number (oxidation state) changed. **Reduced gas – a gas with a low oxidation number **Ore reduction: see… … Wikipedia
reduction — re‧duc‧tion [rɪˈdʌkʆn] noun FINANCE 1. [countable, uncountable] when prices, costs etc become lower or are made lower: • Our winter sale includes many price reductions. • We can make a reduction (= sell something more cheaply … Financial and business terms
Reduction — Réduction Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom … Wikipédia en Français
Reduction — Re*duc tion (r[ e]*d[u^]k sh[u^]n), n. [F. r[ e]duction, L. reductio. See {Reduce}.] 1. The act of reducing, or state of being reduced; conversion to a given state or condition; diminution; conquest; as, the reduction of a body to powder; the… … The Collaborative International Dictionary of English
reduction — Reduction. s. f. v. Action de reduire. Reduction d une ville à l obéissance du Prince. la procession pour la reduction de Paris. reduction d une pinte de liqueur à une chopine. reduction des especes, des monnoyes. reduction des sols en livres.… … Dictionnaire de l'Académie française
Reduction — Saltar a navegación, búsqueda Reduction Álbum de Peter Banks Publicación 1999 Género(s) Rock progresivo … Wikipedia Español
reduction — Reduction, f. acut. Est proprement, ramenement (s il se peut dire ainsi) d une chose à son premier lieu et estat, et est pur Latin de Reductio, hormis du son et prolation François. Et selon ceste deduction, on peut dire Reduction estre,… … Thresor de la langue françoyse
reduction — index abatement (reduction), abridgment (condensation), abstract, capsule, curtailment, decrease, deduction ( … Law dictionary
reduction — [ri duk′shən] n. [LME reduccion < MFr reduction < L reductio < reductus, pp. of reducere] 1. a reducing or being reduced 2. anything made or brought about by reducing, as a smaller copy, lowered price, sauce of concentrated liquid, etc.… … English World dictionary
reduction — reduction. См. редукция. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) … Молекулярная биология и генетика. Толковый словарь.

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