Definition of reduction. 1: the act or process of reducing: the state of being reduced. 2 a: something made by reducing. b: the amount by which something is reduced. 3 [Spanish reduccion, from Latin . Reduction definition, the act of reducing or the state of being reduced. See more.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'reduction. Send us feedback. See more words from the same century. Accessed 24 Apr. More Definitions for reduction. See the full definition for reduction in the English Language Learners Dictionary. Nglish: Translation of reduction for Spanish Speakers. Britannica English: Translation of reduction for Arabic Speakers.
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Two words of uncertainty. We're intent on clearing it up. We're gonna stop you right there. How to use a word that literally drives some pe The awkward case of 'his or her'. Can you correctly identify these flowers?
Which of these things doesn't belong? Test your visual vocabulary with our question Login or Register. Save Word. Definition of reduction. Keep scrolling for more. Examples of reduction in a Sentence a drastic reduction in size Many voters want to see some reduction of the deficit.
There is a 20 percent reduction on selected items during this sale. First Known Use of reduction 15th century, in the meaning defined at sense 1. Learn More about reduction. Time Traveler for reduction The first known what is the federal school code for ucf of reduction was in the 15th century See more words from the same century. Dictionary Entries near reduction reductic acid reductio reductio ad absurdum reduction reduction crusher reduction division reduction gear See More Nearby Entries.
Style: MLA. English Language Learners Definition of reduction. Kids Definition of reduction. Medical Definition of reduction. Comments on reduction What made you want to look up reduction? Show Comments Hide Comments. Get Word of the Day daily email! Test Your Vocabulary. Test your visual vocabulary with our question challenge! Anagram puzzles meet word search. Love words? Need even more definitions?
We're intent on clearing it up 'Nip it in the butt' or 'Nip it in the bud'? We're gonna stop you right there Literally How to use a word that literally drives some pe Is Singular 'They' a Better Choice? Take the quiz Name That Thing Test your visual vocabulary with our question Play the game.
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the process of making something less in price, size, amount, etc., or the fact of it becoming less: a reduction in sth The cutbacks have required a 10% reduction in staff numbers. Policyholders will be . reduction - any process in which electrons are added to an atom or ion (as by removing oxygen or adding hydrogen); always occurs accompanied by oxidation of the reducing agent reducing chemical reaction, reaction - (chemistry) a process in which one or more substances are changed into others; "there was a chemical reaction of the lime with the ground water".
Reduction involves a half-reaction in which a chemical species decreases its oxidation number , usually by gaining electrons. The other half of the reaction involves oxidation, in which electrons are lost. Reduction may be considered the opposite process of oxidation. In some reactions, oxidation and reduction may be viewed in terms of oxygen transfer. Here, oxidation is the gain of oxygen, while reduction is the loss of oxygen.
An old, less-common definition of oxidation and reduction examines the reaction in terms of protons or hydrogen. The most accurate reduction definition involves electrons and oxidation number. Another simple example is the reaction between copper oxide and magnesium to yield copper and magnesium oxide:.
Rusting of iron is a process that involves oxidation and reduction. Oxygen is reduced, while iron is oxidized. While it's easy to identify which species are oxidized and reduced using the "oxygen" definition of oxidation and reduction, it's harder to visualize electrons. One way to do this is to rewrite the reaction as an ionic equation. Copper II oxide and magnesium oxide are ionic compounds, while the metals are not:. The copper ion undergoes reduction by gaining electrons to form copper.
Or, you can view it as magnesium reducing the copper II ions by donating electrons. Magnesium acts as a reducing agent. In the meantime, the copper II ions remove electrons from magnesium to form magnesium ions. The copper II ions are the oxidizing agent. Another example is the reaction that extracts iron from iron ore:.
The iron oxide undergoes reduction loses oxygen to form iron while the carbon monoxide is oxidized gains oxygen to form carbon dioxide. In this context, iron III oxide is the oxidizing agent , which gives oxygen to another molecule. Carbon monoxide is the reducing agent , which removes oxygen from a chemical species. There are two acronyms that may help you keep oxidation and reduction straight.
Another way to remember which part of the reaction is oxidized and which is reduced is to simply recall reduction mean reduction in charge. Share Flipboard Email. Anne Marie Helmenstine, Ph.
Chemistry Expert. Helmenstine holds a Ph. She has taught science courses at the high school, college, and graduate levels. Facebook Facebook Twitter Twitter. Updated August 02, Cite this Article Format. Helmenstine, Anne Marie, Ph. Reduction Definition in Chemistry. Oxidation Definition and Example in Chemistry. Oxidation Reduction Reactions—Redox Reactions. Oxidation and Reduction Reaction Example Problem. Activity Series of Metals: Predicting Reactivity.