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Definitions of reaction

  1. (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" Scrapingweb Dictionary DB
  2. doing something in opposition to another way of doing it that you don't like; "his style of painting was a reaction against cubism" Scrapingweb Dictionary DB
  3. a bodily process occurring due to the effect of some foregoing stimulus or agent; "a bad reaction to the medicine"; "his responses have slowed with age" Scrapingweb Dictionary DB
  4. an idea evoked by some experience; "his reaction to the news was to start planning what to do" Scrapingweb Dictionary DB
  5. extreme conservatism in political or social matters; "the forces of reaction carried the election" Scrapingweb Dictionary DB
  6. a response that reveals a person's feelings or attitude; "he was pleased by the audience's reaction to his performance"; "John feared his mother's reaction when she saw the broken lamp" Scrapingweb Dictionary DB
  7. (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" Scrapingweb Dictionary DB
  8. A regular or characteristic response to a stimulation of the nerves. Webster Dictionary DB
  9. A test for typhoid fever based on the fact that blood serum of one affected, in a bouillon culture of typhoid bacilli, causes the bacilli to agglutinate and lose their motility. Webster Dictionary DB
  10. Any action in resisting other action or force; counter tendency; movement in a contrary direction; reverse action. Webster Dictionary DB
  11. The mutual or reciprocal action of chemical agents upon each other, or the action upon such chemical agents of some form of energy, as heat, light, or electricity, resulting in a chemical change in one or more of these agents, with the production of new compounds or the manifestation of distinctive characters. See Blowpipe reaction, Flame reaction, under Blowpipe, and Flame. Webster Dictionary DB
  12. An action induced by vital resistance to some other action; depression or exhaustion of vital force consequent on overexertion or overstimulation; heightened activity and overaction succeeding depression or shock. Webster Dictionary DB
  13. The force which a body subjected to the action of a force from another body exerts upon the latter body in the opposite direction. Webster Dictionary DB
  14. Backward tendency or movement after revolution, reform, or great progress in any direction. Webster Dictionary DB
  15. Return action or influence; response to influence or effort exerted; a return to a former or opposite state of things; contrary action following the effects of other action; the equal force that a body exerts on an opposing force; chemical change; a chemical process or its result. The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919.
  16. The response of a muscle or other living tissue to a stimulus. 2. The color change affected in litmus and certain other organic pigments by contact with various substances (acids or alkalies); also the property which such substances possess of producing this change. 3. In chemistry the intermolecular action of two or more substances upon each other, whereby these substances are caused to disappear, new ones being formed in their place. A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
  17. That which is produced by a reagent. Warner's pocket medical dictionary of today. By William R. Warner. Published 1898.
  18. Action back upon or resisting other action: mutual action: backward tendency from revolution, reform, or progress. The american dictionary of the english language. By Daniel Lyons. Published 1899.
  19. Action following and contrary to previous action; mutual action. The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894.
  20. Reactive, reactionary. The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894.
  21. Reverse or return action. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  22. The mutual action of chemical agents, or its result. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  23. Counteraction; reciprocal action; action in the contrary, specially backward, direction. Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914.
  24. The resistance made by a body to the action or impulse of another body; an action or force arising in opposition to another which has preceded. Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
  25. Chemical alteration that often goes together with a release of energy and occurs naturally over time. It is purposefully generated in a laboratory, or created as part of an industrial process. thelawdictionary.org
  26. An action by a person or people in response to an event. The reaction may be primarily mental (reaction of surprise dictgcide_fs
  27. An action of resistance to a power applied. A species of vital movement or excitement, tending to prevent or destroy the effects of any noxious power applied to the animal economy, and which, by some, has been attributed to the vis medicatrix naturae. It is certainly dependent on the organic instinctive actions of the frame. It is the state of activity which succeeds the action on the nervous system of certain morbific influences. Medical Lexicon. A Dictionary of Medical Science
  28. Responsive or reciprocal action (esp. action& r.); (Chem.) action set up by one substance in another; response of organ &c. to external stimulus; return of previous condition after interval of opposite (e.g. glow felt after cold bath, depression after excitement); retrograde tendency esp. in politics, whence reactionary a. & (=reactionary person) n., reactionist (2) n. & a. Concise Oxford Dictionary
  29. Opposite action or counter-action. American pocket medical dictionary.
  30. Phenomena caused by chemical action of substances on each other. American pocket medical dictionary.
  31. In chemistry, a physical phenomenon occurring on the application of a chemical test, and hence indicative of the possession of a special chemical property; also, a physical phenomenon indicative of a change in the chemical state of a body; hence the change of state itself, whether this is brought about by the molecular interaction of two or more substances or the application of a physical force. Appleton's medical dictionary.
  32. In psycho-analysis the psychical response to an emotional situation. Appleton's medical dictionary.
  33. The process of recovery from "shock". Appleton's medical dictionary.
  34. The development of fever as the result of an injury, a surgical operation, or the like. Appleton's medical dictionary.
  35. (Chem.) The changes produced by the mutual action of two substances on each other. Glossary of terms and phrases - Percy
  36. (Math.) When two bodies (A and B) act on each other the action is mutual; if the force exerted by A on B is regarded as the action, the force exerted by B on A is the R. In most cases there is some obvious reason for regarding one of the forces as the action; thus when a horse draws a cart, the force exerted by the horse on the cart would be called the action, that exerted by the cart on the horse the R. Glossary of terms and phrases - Percy
  37. n. Any action in resisting other action or power; counter tendency or movement ;-the mutual or reciprocal action of chemical agents upon each other ;--depression of vital force consequent on over-exertion ;-backward tendency from revolution, reform, or progress. Cabinet Dictionary

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