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Definition of Reaction
1. Noun. (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"
Category relationships: Chemical Science, Chemistry
Specialized synonyms: Addition Reaction, Aldol Reaction, Chain Reaction, Chemical Equilibrium, Equilibrium, Chemical Decomposition Reaction, Decomposition, Decomposition Reaction, Displacement, Displacement Reaction, Double Decomposition, Double Decomposition Reaction, Metathesis, Elimination Reaction, Endothermic Reaction, Exothermic Reaction, Hydrolysis, Neutralisation, Neutralisation Reaction, Neutralization, Neutralization Reaction, Oxidation, Oxidisation, Oxidization, Oxidation-reduction, Oxidoreduction, Redox, Photochemical Reaction, Reducing, Reduction, Saponification
Generic synonyms: Chemical Action, Chemical Change, Chemical Process
Derivative terms: React
2. Noun. An idea evoked by some experience. "His reaction to the news was to start planning what to do"
3. Noun. A bodily process occurring due to the effect of some antecedent stimulus or agent. "His responses have slowed with age"
Specialized synonyms: Automatism, Rebound, Overreaction, Electrical Skin Response, Electrodermal Response, Fere Phenomenon, Galvanic Skin Response, Gsr, Psychogalvanic Response, Tarchanoff Phenomenon, Immune Reaction, Immune Response, Immunologic Response, Tropism, Taxis, Kinesis, Double Take, Inborn Reflex, Innate Reflex, Instinctive Reflex, Physiological Reaction, Reflex, Reflex Action, Reflex Response, Unconditioned Reflex, Learned Reaction, Learned Response, Passage, Passing, Answer, Transfusion Reaction
Generic synonyms: Activity, Bodily Function, Bodily Process, Body Process
Derivative terms: React
4. Noun. (mechanics) the equal and opposite force that is produced when any force is applied to a body. "Every action has an equal and opposite reaction"
5. Noun. A response that reveals a person's feelings or attitude. "John feared his mother's reaction when she saw the broken lamp"
6. Noun. Extreme conservatism in political or social matters. "The forces of reaction carried the election"
7. Noun. Doing something in opposition to another way of doing it that you don't like. "His style of painting was a reaction against cubism"
Definition of Reaction
1. n. Any action in resisting other action or force; counter tendency; movement in a contrary direction; reverse action.
2. n. A regular or characteristic response to a stimulation of the nerves.
Definition of Reaction
1. Noun. An action or statement in response to a stimulus or other event ¹
2. Noun. (chemistry) A transformation in which one or more substances is converted into another by combination or decomposition ¹
3. Noun. (rare spelling of (reaction)) ¹
¹ Source: wiktionary.com
Definition of Reaction
1. the act of reacting [n -S]
Medical Definition of Reaction
1. Standard method for identifying Clostridium perfringens. When grown on agar containg egg yolk, an opalescent halo is formed around colonies that produce _ toxin (lecithinase). This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)
Lexicographical Neighbors of Reaction
Literary usage of Reaction
Below you will find example usage of this term as found in modern and/or classical literature:
1. Journal of the American Chemical Society by American Chemical Society (1895)
"It had been the intention to study the reaction between zinc sulphate and ...
Young had made " A Thermo- chemical Analysis of the reaction between Alum and ..."
2. The Encyclopedia Americana: A Library of Universal Knowledge (1919)
"The third general type of reaction between two primary substances (that, namely,
in which there is a double decomposition) may be illustrated by the action ..."
3. Monographic Medicine by William Robie Patten Emerson, Guido Guerrini, William Brown, Wendell Christopher Phillips, John Whitridge Williams, John Appleton Swett, Hans Günther, Mario Mariotti, Hugh Grant Rowell (1916)
"The biuret reaction depends upon the presence of pairs of groups of the character—
... Millon's reaction.—Boil the solution containing protein with Millon's ..."
4. The Encyclopedia Americana: A Library of Universal Knowledge (1919)
"The third general type of reaction between two primary substances (that, namely,
in which there is a double decomposition) may be illustrated by the action ..."
5. A Compendium of the Course of Chemical Instruction in the Medical Department by Robert Hare (1828)
"reaction between different portions of matter, is conceived to be the fundamental
cause of the phenomena and operations of the physical world; ..."
6. Nature by Norman Lockyer (1877)
"The intensity of the reaction is thus brought completely and easily under ...
And as the reaction oi the instrument varies as the square of its speed of ..."
7. The American Journal of Psychology by Granville Stanley Hall, Edward Bradford Titchener (1911)
"Among other neglected factors in these experiments has been the effect of the
tension of the reaction key spring. This has usually been set at a ..."
8. The American Journal of Psychology by Granville Stanley Hall, Edward Bradford Titchener (1912)
"prises those instances where the reaction word is a recurrence of a preceding
reaction word. There were altogether six examples of this: in all of them the ..."
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