| 释义 |
reaction
re·ac·tion R0066700 (rē-ăk′shən)n.1. a. A response to a stimulus.b. The state resulting from such a response.2. A reverse or opposing action.3. a. A tendency to revert to a former state.b. Opposition to progress or liberalism; extreme conservatism.4. Chemistry A change or transformation in which a substance decomposes, combines with other substances, or interchanges constituents with other substances.5. Physics A nuclear reaction.6. Physics An equal and opposite force exerted by a body against another body that is exerting a force on it.7. The response of cells or tissues to an antigen, as in a test for immunization.reaction (rɪˈækʃən) n1. a response to some foregoing action or stimulus2. the reciprocal action of two things acting together3. (Government, Politics & Diplomacy) opposition to change, esp political change, or a desire to return to a former condition or system4. (Psychology) a response indicating a person's feelings or emotional attitude5. (Medicine) med a. any effect produced by the action of a drug, esp an adverse effect. Compare side effectb. any effect produced by a substance (allergen) to which a person is allergic6. (Chemistry) short for chemical reaction, nuclear reaction7. (Nuclear Physics) short for chemical reaction, nuclear reaction8. (Stock Exchange) stock exchange a sharp fall in price interrupting a general rise reˈactional adjUsage: Reaction is used to refer both to an instant response (her reaction was one of amazement) and to a considered response in the form of a statement (the Minister gave his reaction to the court's decision). Some people think this second use is incorrectre•ac•tion (riˈæk ʃən)
n. 1. action in response to some influence, event, etc.: the nation's reaction to the president's speech. 2. a. a physiological response to an action or condition. b. a physiological change indicating sensitivity to foreign matter: an allergic reaction. 3. an action in a reverse direction or manner. 4. a movement toward extreme political conservatism; a desire to return to an earlier system or order. 5. a. the reciprocal action of chemical agents upon each other; chemical change. b. a process that, unlike a chemical reaction, has the power to change the nucleus of an atom, as radioactive decay, fission, or the like. 6. Mech. the instantaneous response of a system to an applied force, manifested as the exertion of a force equal in magnitude, but opposite in direction, to the applied force. [1635–45; on the model of react] re•ac′tion•al, adj. re·ac·tion (rē-ăk′shən)1. A rearrangement of the atoms or molecules of two or more substances that come into contact with each other, resulting in the formation of one or more new substances. Chemical reactions are caused by electrons of one substance interacting with those of another. The reaction of an acid with a base, for example, results in the creation of a salt and water. Some, but not all, reactions can be reversed.2. A change to the structure of an atomic nucleus; a nuclear reaction.3. An action that results directly from or counteracts another action, especially the change in a body's motion as a result of a force applied to it. Some reactions counteract forces and are not readily apparent. When an object rests on a surface, such as a table, for example, the downward force it applies to the surface is counteracted by an equal but upwards force, or reaction, applied by the surface. See more at Newton's laws of motion.reactionA process in which substances react to form new substances. Bonds are broken and re-formed in chemical reactions.Thesaurus| Noun | 1. |  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"chemical reactionchemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactionsaddition reaction - a chemical reaction in which one molecule is added to anotheraldol reaction - a reaction of aldehydes resulting in an aldolchain reaction - a series of chemical reactions in which the product of one is a reactant in the nextchemical equilibrium, equilibrium - a chemical reaction and its reverse proceed at equal rateschemical action, chemical change, chemical process - (chemistry) any process determined by the atomic and molecular composition and structure of the substances involvedchemical decomposition reaction, decomposition reaction, decomposition - (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substancedisplacement reaction, displacement - (chemistry) a reaction in which an elementary substance displaces and sets free a constituent element from a compounddouble decomposition, double decomposition reaction, metathesis - a chemical reaction between two compounds in which parts of each are interchanged to form two new compounds (AB+CD=AD+CB)elimination reaction - a chemical reaction in which a molecule decomposes to two different moleculesendothermic reaction - a chemical reaction accompanied by the absorption of heatexothermic reaction - a chemical reaction accompanied by the evolution of heathydrolysis - a chemical reaction in which water reacts with a compound to produce other compounds; involves the splitting of a bond and the addition of the hydrogen cation and the hydroxide anion from the waterneutralisation, neutralisation reaction, neutralization reaction, neutralization - a chemical reaction in which an acid and a base interact with the formation of a salt; with strong acids and bases the essential reaction is the combination of hydrogen ions with hydroxyl ions to form wateroxidation, oxidisation, oxidization - the process of oxidizing; the addition of oxygen to a compound with a loss of electrons; always occurs accompanied by reductionoxidation-reduction, oxidoreduction, redox - a reversible chemical reaction in which one reaction is an oxidation and the reverse is a reductionphotochemical reaction - a chemical reaction produced by the action of lightreducing, 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 agentsaponification - a chemical reaction in which an ester is heated with an alkali (especially the alkaline hydrolysis of a fat or oil to make soap) | | 2. | reaction - an idea evoked by some experience; "his reaction to the news was to start planning what to do"idea, thought - the content of cognition; the main thing you are thinking about; "it was not a good idea"; "the thought never entered my mind" | | 3. | reaction - a bodily process occurring due to the effect of some antecedent stimulus or agent; "a bad reaction to the medicine"; "his responses have slowed with age"responseautomatism - any reaction that occurs automatically without conscious thought or reflection (especially the undirected behavior seen in psychomotor epilepsy)rebound - a reaction to a crisis or setback or frustration; "he is still on the rebound from his wife's death"overreaction - an excessive reaction; a reaction with inappropriate emotional behaviorelectrical skin response, electrodermal response, Fere phenomenon, galvanic skin response, GSR, psychogalvanic response, Tarchanoff phenomenon - a change in the electrical properties of the skin in response to stress or anxiety; can be measured either by recording the electrical resistance of the skin or by recording weak currents generated by the bodyimmune reaction, immune response, immunologic response - a bodily defense reaction that recognizes an invading substance (an antigen: such as a virus or fungus or bacteria or transplanted organ) and produces antibodies specific against that antigentropism - an involuntary orienting response; positive or negative reaction to a stimulus sourcetaxis - a locomotor response toward or away from an external stimulus by a motile (and usually simple) organismkinesis - a movement that is a response to a stimulus but is not oriented with respect to the source of stimulationdouble take - a delayed reaction indicating surpriseinborn reflex, innate reflex, instinctive reflex, physiological reaction, reflex, reflex action, reflex response, unconditioned reflex - an automatic instinctive unlearned reaction to a stimuluslearned reaction, learned response - a reaction that has been acquired by learningpassing, passage - a bodily reaction of changing from one place or stage to another; "the passage of air from the lungs"; "the passing of flatus"answer - a nonverbal reaction; "his answer to any problem was to get drunk"; "their answer was to sue me"transfusion reaction - reaction of the body to a transfusion of blood that is not compatible with its own blood; an adverse reaction can range from fever and hives to renal failure and shock and deathbodily function, bodily process, body process, activity - an organic process that takes place in the body; "respiratory activity" | | 4. | reaction - (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"mechanics - the branch of physics concerned with the motion of bodies in a frame of referenceforce - (physics) the influence that produces a change in a physical quantity; "force equals mass times acceleration" | | 5. |  reaction - 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"response - a result; "this situation developed in response to events in Africa" | | 6. | reaction - extreme conservatism in political or social matters; "the forces of reaction carried the election"conservatism, conservativism - a political or theological orientation advocating the preservation of the best in society and opposing radical changes | | 7. | reaction - doing something in opposition to another way of doing it that you don't like; "his style of painting was a reaction against cubism"opposition, resistance - the action of opposing something that you disapprove or disagree with; "he encountered a general feeling of resistance from many citizens"; "despite opposition from the newspapers he went ahead"backlash - an adverse reaction to some political or social occurrence; "there was a backlash of intolerance" |
reactionnoun1. response, acknowledgment, feedback, answer, reply He showed no reaction when the judge pronounced his sentence.2. counteraction, compensation, backlash, recoil, counterbalance, counterpoise All new fashion starts out as a reaction against existing convention.3. conservatism, the right, the extreme right, counter-revolution, obscurantism their victory against the forces of reaction and conservatism4. sensitivity, condition, susceptibility, hypersensitivity, allergic effect Common foods which cause this kind of reaction are fish, eggs and shellfish.reactionnoun1. An action elicited by a stimulus:response, retroaction.2. The way in which a machine or other thing performs or functions:behavior, functioning, operation, performance, working (often used in plural).Translationsreact (riˈӕkt) verb1. to behave in a certain way as a result of something. How did he react when you called him a fool?; He reacted angrily to the criticism; Hydrogen reacts with oxygen to form water. 起反應 起反应2. (with against) to behave or act in a certain way in order to show rejection of. Young people tend to react against their parents. 反抗 反抗3. (with to) to be affected, usually badly, by (a drug etc). I react very badly to penicillin. (對藥物等)有（不良）反應 （对药物等）有不良反应，过敏（药物等）产生副作用 reˈaction (-ʃən) noun1. the act of reacting. What was his reaction to your remarks?; I get a bad reaction from penicillin; I'd like to ask you for your reactions to these suggestions. 反應 反应2. a change of opinions, feelings etc (usually against someone or something). The new government was popular at first, but then a reaction began. 反動勢力 反作用力3. a process of change which occurs when two or more substances are put together. (a) nuclear reaction; a chemical reaction between iron and acid. 化學反應 化学反应reˈactionary (-ʃə-) adjective, noun (plural reˈactionaries) (a person) opposed to change and progress or favouring a return to things as they were. 反動的 反动的reˈactor noun (also nuclear reactor) an apparatus in which nuclear energy is produced which can be used as a source of power, eg when converted into electricity. 核子反應爐 原子炉，核反应堆（原子）反应堆
reaction
chain reactionA series of events wherein the outcome of each instance specifically influences or causes the next. The phrase comes from the occurrence of such reactions in chemistry and physics. Deciding to take a course studying James Joyce in college set up a chain reaction that ultimately led me to move to Ireland. When one bookshelf fell, it caused a chain reaction that knocked over all the rest.See also: chain, reactiongut reactionA reaction to a situation based on a person's instinct and feelings, rather than on a logical analysis. My initial gut reaction was that the merger would result in a drop in stock prices, but the opposite turned out to be true.See also: gut, reactiongut reaction to (something)A reaction to a situation based on a person's instinct and feelings, rather than on a logical analysis. My initial gut reaction to news of the merger was that it would result in a drop in stock prices, but the opposite turned out to be true.See also: gut, reactionknee-jerk reactionFig. an automatic or reflex reaction; an immediate reaction made without examining causes or facts. With one of his typical knee-jerk reactions, he said no immediately, citing some moral argument that no one understood.See also: reactionchain reactionA series of events in which each influences or gives rise to the next event, as in If one person collects substantial damages by suing a company, you can expect a chain reaction of such lawsuits . The term originated in the physical sciences, first (1920s) chemistry and later (1940) physics; in the latter it denotes a process of nuclear fission. By the 1940s it had been transferred to more general use. See also: chain, reactiona gut reaction COMMON A gut reaction is a reaction that you have immediately and strongly, without thinking about something or being aware of your reasons. At first my gut reaction was to never write again. My heart's loyal to the party but my gut reaction is to vote against the bill.1. If you describe a task or activity as gut-busting, you mean it is very hard work. It would be hard work, he predicted — back-breaking, gut-busting, unbelievably hard work.2. You can use gut-busting to describe a very large amount of food. Walker set a record by eating a gut-busting 32 pies.See also: gut, reactiongut reaction (to something) n. a basic and immediate response to something. Her gut reaction to the plan is basically a good one. See also: gut, reaction, somethinggut reaction verbSee gut reaction to somethingSee also: gut, reactionReaction
reaction1. opposition to change, esp political change, or a desire to return to a former condition or system 2. a response indicating a person's feelings or emotional attitude 3. Meda. any effect produced by the action of a drug, esp an adverse effect b. any effect produced by a substance (allergen) to which a person is allergic the simultaneous equal and opposite force that acts on a body whenever it exerts a force on another body 4. short for chemical reaction, nuclear reactionReaction in the political sense, resistance to social progress; a political regime established to maintain and strengthen an outmoded social order. Reaction usually manifests itself in the struggle against the revolutionary movement, in the suppression of democratic rights and liberties, in the persecution of progressive political, public, and cultural figures, in mass terror and violence, in racial and national discrimination, and in an aggressive foreign policy. Reaction in its extreme form is fascism. A reactionary is an adherent of political reaction, a retrograde person, an enemy of social, cultural, and scientific progress.
Reaction in psychology, a behavioral act that takes place in response to a certain stimulus; a voluntary movement that takes place in response to a signal and is influenced by the subject’s idea of the task to be performed. It became necessary to investigate voluntary reaction after it was discovered that astronomers attempting to note the moment a star passed through a meridian were giving different figures. F. Bessel, who discovered this phenomenon, conducted an experiment in 1823 to measure reaction times of human beings to stimuli. The measurement of speed, intensity, and course of reactions created psychometrics as a branch of psychology with a special method of investigation—the method of reaction. Pioneers in this field included F. Donders of Denmark and W. Wundt, L. Lange, and N. N. Lange. Reaction was also studied by the Soviet psychologist K. N. Kornilov, the founder of reactology. There are two basic types of reactions: simple and complex. In a simple reaction, a person quickly responds with a movement (motor and sensory reaction) to a single prearranged signal. In a complex reaction, when various signals are randomly given, a person responds to only one of them (discrimination reaction) or to all of them, but with various movements (choice reaction). The study of reaction has made it possible to formulate a number of principles of applied psychology, such as Hick’s law, which states that reaction time increases with an increase in the number of stimuli presented for discrimination. REFERENCESWundt, W. Osnovy fiziologicheskoi psikhologii, fascs. 1–16. St. Petersburg, 1908–14.
Inzhenernaia psikhologiia za rubezhom. Moscow, 1967. Pages 408–24. (Collection of articles translated from English.)
See also references under .V. I. MAKSIMENKO reaction[rē′ak·shən] (control systems) positive feedback (mechanics) The equal and opposite force which results when a force is exerted on a body, according to Newton's third law of motion. (nuclear physics) nuclear reaction reaction
reaction [re-ak´shun] 1. opposite action or counteraction; the response of a part to stimulation.2. the phenomena caused by the action of chemical agents; a chemical process in which one substance is transformed into another substance or substances.3. in psychology, the mental or emotional state that develops in any particular situation.4. the specific cellular effect produced by foreign matter, as in testing for allergies. For specific reactions, see under the name, such as pirquet's reaction.reaction of degeneration the reaction to electrical stimulation of muscles whose nerves have degenerated, consisting of loss of response to a faradic stimulation in a muscle, and to galvanic and faradic stimulation in the nerve.reaction time the time elapsing between the application of a stimulus and the resulting reaction.re·ac·tion (rē-ak'shŭn), 1. The response of a muscle or other living tissue or organism to a stimulus. 2. The color change effected in litmus and certain other organic pigments by contact with substances such as acids or alkalies; also the property that such substances possess to produce this change. 3. In chemistry, the intermolecular action of two or more substances on each other, whereby these substances are caused to disappear, with new ones being formed in their place (chemical reaction). 4. In immunology, in vivo or in vitro action of an antibody on a specific antigen, with or without the involvement of a complement or other components of the immune system. [L. re-, again, backward, + actio, action] reaction Vox populi A response in a chemical, immunologic, physiologic, psychological, or other interaction. See Allergic reaction, Anaphylactic reaction, Anniversary reaction, Anxiety reaction, Conversion reaction, Cortical reaction, Cross- reaction, Downgrading reaction, Fixed drug reaction, Harlequin skin reaction, Hemagglutination inhibition reaction, Hemolytic transfusion reaction, Hysterical reaction, Late phase reaction, Leukemoid reaction, Leukoerythroblastic reaction, Leukotriene reaction, Magnet reaction, Mourning reaction, Myasthenic reaction, Nonhemolytic transfusion reaction, Parachute reaction, Pseudomyotonic reaction, Uphill reaction, Vasopermeability reaction, Wheal-and-flare reaction. re·ac·tion (rē-ak'shŭn) 1. The response of a muscle or other living tissue or organism to a stimulus. 2. The color change effected in litmus and certain other organic pigments by contact with substances such as acids or alkali; also the property that such substances possess to produce this change. 3. chemistry The intermolecular action of two or more substances on each other, whereby these substances are made to disappear and new ones are formed in their place (chemical reaction). 4. immunology Action of an antibody on a specific antigen in vivo or in vitro, with or without the involvement of complement or other components of the immunologic system. [L. re-, again, backward, + actio, action]reaction a chemical process during which one substance is changed to another.re·ac·tion (rē-ak'shŭn) 1. Response of a muscle or other living tissue or organism to a stimulus. 2. Color change effected in litmus and other organic pigments by contact with substances. [L. re-, again, backward, + actio, action]Patient discussion about reactionQ. what cause an allergic reaction? A. Frankly? no ones actually knows for sure. What we do know, is that due to some reason the immune system of certain people, regard several non-harmful substances (e.g. peanuts, antibiotics, bee's venom) as an enemy and learn to react to it.
This tendency to develop abnormal responses to substances other people don't response to is called "atopy". It has a very strong genetic basis (i.e. it runs in families), and also depends on other factors such as the exposure to infections and the pattern of exposure to the allergen (the substance that causes allergy).
It's a very wide subject, far beyond the scope of my answer, so you may read more here:
http://www.nlm.nih.gov/medlineplus/allergy.html
Q. Is it common to get an allergic reaction in the eye from olive harvest? I've been around olive trees for a few hours and now feel like I have something in my eye but there is nothing there. can it be an allergic reaction? I dont get it from eating olives...A. but in one eye..? that just doesn't seem likely. but i guess there is no reason not to try both treatments.... Q. I am worried about the allergic reactions I had from the Chinese herbal drug. I am worried about the allergic reactions I had from the Chinese herbal drug that I took for my arthritis…..are these safe?A. Many people have some type of reaction to either a drug and even a supplement. You can check with your doc to get tested to see what your sensitivities are. Regarding arthritis, no milk, cheese, yogurt, butter, anything with milk for starters, AVOID like the plague! Suagr consumption too will raise hell with it. There is a product that someone I knew took, called, "Cell Guard" which he bought at a health food store or Whole Foods. After a couple of months, he was pain free. Its worth a try! Cell Guard is made with SOD or "superoxide dismutase"
Studies have shown that SOD can play a critical role in reducing internal inflammation and lessening pain associated with conditions such as arthritis! Check it out! Let me know how you do! More discussions about reactionReaction
ReactionA decline in prices following an advance. Opposite of rally.ReactionA decrease in price following an increase in price. A reaction connotes a slow decline; it is the opposite of a recovery.reaction A decline in security prices following a period of rising security prices.AcronymsSeeRXNreaction
Related to reaction: reaction timeSynonyms for reactionnoun responseSynonyms- response
- acknowledgment
- feedback
- answer
- reply
noun counteractionSynonyms- counteraction
- compensation
- backlash
- recoil
- counterbalance
- counterpoise
noun conservatismSynonyms- conservatism
- the right
- the extreme right
- counter-revolution
- obscurantism
noun sensitivitySynonyms- sensitivity
- condition
- susceptibility
- hypersensitivity
- allergic effect
Synonyms for reactionnoun an action elicited by a stimulusSynonymsnoun the way in which a machine or other thing performs or functionsSynonyms- behavior
- functioning
- operation
- performance
- working
Synonyms for reactionnoun (chemistry) a process in which one or more substances are changed into othersSynonymsRelated Words- chemical science
- chemistry
- addition reaction
- aldol reaction
- chain reaction
- chemical equilibrium
- equilibrium
- chemical action
- chemical change
- chemical process
- chemical decomposition reaction
- decomposition reaction
- decomposition
- displacement reaction
- displacement
- double decomposition
- double decomposition reaction
- metathesis
- elimination reaction
- endothermic reaction
- exothermic reaction
- hydrolysis
- neutralisation
- neutralisation reaction
- neutralization reaction
- neutralization
- oxidation
- oxidisation
- oxidization
- oxidation-reduction
- oxidoreduction
- redox
- photochemical reaction
- reducing
- reduction
- saponification
noun an idea evoked by some experienceRelated Wordsnoun a bodily process occurring due to the effect of some antecedent stimulus or agentSynonymsRelated Words- 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
- passing
- passage
- answer
- transfusion reaction
- bodily function
- bodily process
- body process
- activity
noun (mechanics) the equal and opposite force that is produced when any force is applied to a bodyRelated Wordsnoun a response that reveals a person's feelings or attitudeRelated Wordsnoun extreme conservatism in political or social mattersRelated Words- conservatism
- conservativism
noun doing something in opposition to another way of doing it that you don't likeRelated Words- opposition
- resistance
- backlash
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