Definition of "reaction" 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" noun: 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" noun: extreme conservatism in political or social matters; "the forces of reaction carried the election" noun: an idea evoked by some experience; "his reaction to the news was to start planning what to do" noun: 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" 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"

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	WikiPedia definition of "reaction" A reaction is usually any response caused by some other event: Adverse drug reaction; Chemical reaction; Light reaction; Nuclear reaction; Reaction (physics), as defined by Newton ... (More) A chemical reaction is a process that always results in the interconversion of chemical substances. The substance or substances initially involved in a chemical reaction are called ... (More) In classical mechanics, Newton's third law states that forces occur in pairs, one called the Action and the other the Reaction (actio et reactio in Latin). (More) In chemistry, reaction quotient is a quantitative measure of the extent of reaction, the relative proportion of products and reactants present in the reaction mixture at some ... (More) Chemical kinetics, also known as reaction kinetics, is the study of rates of chemical processes. Chemical kinetics includes investigations of how different experimental conditions ... (More) The reaction rate or rate of reaction for a reactant or product in a particular reaction is intuitively defined as how fast a reaction takes place. (More) Reaction time (RT) is the elapsed time between the presentation of a sensory stimulus and the subsequent behavioral response. RT is often used in experimental psychology to measure ... (More) A reaction engine is an engine which provides propulsion by expelling reaction mass, in accordance with Newton's third law of motion. This law of motion is most commonly ... (More) In chemistry, a reaction mechanism is the step by step sequence of elementary reactions by which overall chemical change occurs . Although only the net chemical change is directly ... (More) The Heck reaction (also called the Mizoroki-Heck reaction) is the chemical reaction of an unsaturated halide (or triflate) with an alkene and a strong base and palladium catalyst ... (More)

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