reaction has definitions from the fields of biology,politics,mechanics,chemistry
1
[ noun ] a response that reveals a person's feelings or attitude

Examples

"he was pleased by the audience's reaction to his performance" "John feared his mother's reaction when she saw the broken lamp"

Related terms

response react

2
[ noun ] (biology) a bodily process occurring due to the effect of some foregoing stimulus or agent

Synonyms

response

Examples

"a bad reaction to the medicine" "his responses have slowed with age"

Used in print

(J. W. C. Hagstrom et al., "Debilitating muscular...)

These reactions were interpreted as being manifestations of hypoadrenocorticism .

(E. Gellhorn, "Prolegomena to a theory of the emotions"...)

Since emotional reactions in the higher vertebrates depend_on individual experience and are aroused in man , in_addition , by complex symbols , one would expect that the hypothalamus could be excited from the cortex .

This explains the beneficial effect of electroshock_therapy in certain depressions and a shift in the reaction from hypo - to normal reactivity of the sympathetic system as shown by the Mecholyl_test .

The Mecholyl and noradrenalin tests applied with certain precautions are reliable indicators of this central autonomic balance , but for the sake of correlating autonomic and clinical states , and of studying the effect of certain therapeutic procedures on central autonomic reactions , additional tests seem to be desirable .

(William S. Haymond, "Is Distance an Original...)

It is as_follows : `` The usual sensitivity tests showed that the specific qualities of skin-perceptiveness ( pressure , pain , temperature ) , as_well_as the kinesthetic sensations ( muscular feelings , feelings in the tendons and joints ) , were , as_such , essentially intact , although they seemed , in_comparison_with normal reactions , to be somewhat diminished over the entire body .

3
[ noun ] an idea evoked by some experience

Examples

"his reaction to the news was to start planning what to do"

Used in print

("Editorials"...)

Not terror , but anger and resentment have been the general reaction outside the Soviet sphere .

(Edward E. Kelly, S.J., "Christian Unity in England"...)

In representing part of this new picture , I will be recounting some of my own personal experiences , reactions and judgments ; but my primary aim is to transcribe what Englishmen themselves are saying and writing and implying about the Roman and Anglican_Churches and about the present religious state of England .

(Tristram P. Coffin, "Folklore in the American Twentieth...)

That much of what he calls folklore is the result of beliefs carefully sown among the people with the conscious aim of producing a desired mass emotional reaction to a particular situation or set of situations is irrelevant .

(John Michael Ray, "Rhode Island's Reactions...)

In the eastern section of the state the newspapers ' reaction to Brown 's trial and sentence were basically identical .

Related terms

idea

4
[ noun ] (chemistry) a process in which one or more substances are changed into others

Examples

"there was a chemical reaction of the lime with the ground water"

Used in print

(James A. Ibers et al., "Proton magnetic resonance...)

This latter reaction is in_accord with the reported decomposition of **f .

The small reaction occurring at 337 ` C is probably caused by decomposition of occluded nitrates , and perhaps by a small amount of some hydrous material other_than **f .

(Francis J. Johnston and John E. Willard, "The...)

Despite extensive attempts to obtain highly pure reagents , serious difficulty was experienced in obtaining reproducible rates of reaction .

The rate of the gas phase exchange reaction appears to be proportional to the first power of the absorbed light intensity indicating that the radical intermediates are removed at the walls or by reaction with an impurity rather than by bimolecular radical combination reactions .

The rate of the gas phase exchange reaction appears to be proportional to the first power of the absorbed light intensity indicating that the radical intermediates are removed at the walls or by reaction with an impurity rather than by bimolecular radical combination reactions .

5
[ noun ] doing something in opposition to another way of doing it that you don't like

Examples

"his style of painting was a reaction against cubism"

Related terms

resistance backlash

6
[ noun ] (politics) extreme conservatism in political or social matters

Examples

"the forces of reaction carried the election"

Related terms

conservatism

7
[ noun ] (mechanics) the equal and opposite force that is produced when any force is applied to a body

Examples

"every action has an equal and opposite reaction"

Related terms

force mechanics

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