reaction
n. action made in response to a stimulus; return to a previous state, restoration of a past condition | ||||
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Reaction definition was found in categories: Business & Finance(1) Language, Idioms & Slang(7) Science & Technology(3) Medicine(2) Entertainment & Music(1) Encyclopedia(1)
Reaction Definition from Business & Finance Dictionaries & Glossaries
Reaction Definition from Language, Idioms & Slang Dictionaries & Glossaries
| Webster's Revised Unabridged Dictionary (1913) |
Reaction
(n.)
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.
(n.)
The force which a body subjected to the action of a force from another body exerts upon the latter body in the opposite direction.
(n.)
Backward tendency or movement after revolution, reform, or great progress in any direction.
(n.)
Any action in resisting other action or force; counter tendency; movement in a contrary direction; reverse action.
(n.)
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.
(n.)
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.
(n.)
The force which a body subjected to the action of a force from another body exerts upon the latter body in the opposite direction.
(n.)
Backward tendency or movement after revolution, reform, or great progress in any direction.
(n.)
Any action in resisting other action or force; counter tendency; movement in a contrary direction; reverse action.
(n.)
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.
| WordNet 2.0 |
reaction
Noun
1. 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"
(hypernym) response
(derivation) react, respond
2. 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"
(synonym) response
(hypernym) bodily process, body process, bodily function, activity
(hyponym) automatism
(derivation) react, respond
3. (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"
(synonym) chemical reaction
(hypernym) chemical process, chemical change, chemical action
(hyponym) addition reaction
(derivation) react
(classification) chemistry, chemical science
4. an idea evoked by some experience; "his reaction to the news was to start planning what to do"
(hypernym) idea, thought
5. doing something in opposition to another way of doing it that you don't like; "his style of painting was a reaction against cubism"
(hypernym) resistance, opposition
(hyponym) backlash
6. extreme conservatism in political or social matters; "the forces of reaction carried the election"
(hypernym) conservatism, conservativism
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"
(hypernym) force
(classification) mechanics
Noun
1. 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"
(hypernym) response
(derivation) react, respond
2. 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"
(synonym) response
(hypernym) bodily process, body process, bodily function, activity
(hyponym) automatism
(derivation) react, respond
3. (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"
(synonym) chemical reaction
(hypernym) chemical process, chemical change, chemical action
(hyponym) addition reaction
(derivation) react
(classification) chemistry, chemical science
4. an idea evoked by some experience; "his reaction to the news was to start planning what to do"
(hypernym) idea, thought
5. doing something in opposition to another way of doing it that you don't like; "his style of painting was a reaction against cubism"
(hypernym) resistance, opposition
(hyponym) backlash
6. extreme conservatism in political or social matters; "the forces of reaction carried the election"
(hypernym) conservatism, conservativism
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"
(hypernym) force
(classification) mechanics
| The Phrase Finder |
A knee jerk reaction
Meaning
An automatic response to something.
Origin
From the tendency of the knee to jerk involuntarily when hit sharply.
Meaning
An automatic response to something.
Origin
From the tendency of the knee to jerk involuntarily when hit sharply.
| Anagram |
reaction
creation
creation
| hEnglish - advanced version |
reaction
reaction
read-only memory n : (computer science) memory whose contents can be accessed and read but cannot be changed [syn: rom, read-only storage , fixed storage]
similar words(24)
wasserman reaction
reaction engine
type i allergic reaction
learned reaction
chemical reaction
reaction formation
law of action and reaction
quellung reaction
nuclear fusion reaction
reaction wheel
light reaction
reaction-propulsion engine
reaction propulsion
transfusion reaction
reaction time
reaction turbine
type iv allergic reaction
alkaline reaction
blowpipe reaction
flame reaction
insulin reaction
immune reaction
thermonuclear reaction
physiological reaction
reaction
read-only memory n : (computer science) memory whose contents can be accessed and read but cannot be changed [syn: rom, read-only storage , fixed storage]
similar words(24)
wasserman reaction
reaction engine
type i allergic reaction
learned reaction
chemical reaction
reaction formation
law of action and reaction
quellung reaction
nuclear fusion reaction
reaction wheel
light reaction
reaction-propulsion engine
reaction propulsion
transfusion reaction
reaction time
reaction turbine
type iv allergic reaction
alkaline reaction
blowpipe reaction
flame reaction
insulin reaction
immune reaction
thermonuclear reaction
physiological reaction
| for Vocabulary Exams of KPDS, YDS,UDS (in Turkey); and SAT in America |
reaction
Tendency towards a former, or opposite state of things, as after reform, revolution, or inflatio
Tendency towards a former, or opposite state of things, as after reform, revolution, or inflatio
| JM Welsh <=> English Dictionary |
Gwrthegni
Gwrthegni = n. a reaction
Gwrthegni = n. a reaction
Reaction Definition from Science & Technology Dictionaries & Glossaries
| NRC Nuclear Energy Glossary |
Reaction
Any process involving a chemical or nuclear change.
Any process involving a chemical or nuclear change.
| Technical English by wpv |
Reaction
A reaction is a force exerted by a support on an object: sometimes called support reaction. Using this definition, a reaction is an external force.
A reaction is a force exerted by a support on an object: sometimes called support reaction. Using this definition, a reaction is an external force.
| General Chemistry Glossary |
chemical change (reaction)
Say it
Compare with physical change. A chemical change is a dissociation, recombination, or rearrangement of atoms.
Compare with physical change. A chemical change is a dissociation, recombination, or rearrangement of atoms.
Reaction Definition from Medicine Dictionaries & Glossaries
| Dictionary of Medicine (Shahram) |
Allergic reaction
A reaction that occurs when the immune system attacks a usually harmless substance (an allergen) that gains access to the body. The immune system calls upon a protective substance called immunoglobulin E (IgE) to fight these invading allergic substances ( allergens). Even though everyone has some IgE, an allergic person has an unusually large army of these IgE defenders -in fact, too many for their own good. This army of IgE antibodies attacks and engages the invading army of allergic substances of allergens. As is often the case in war, innocent bystanders are affected by this battle. These innocent bystanders are special cells called mast cells. These cells are frequently injured during the warring of the IgE antibodies and the allergic substances. When a mast cell is injured, it releases a variety of strong chemicals including histamine into the tissues and blood that frequently cause allergic reactions. These chemicals are very irritating and cause itching, swelling, and fluid leaking from cells. These allergic chemicals can cause muscle spasm and can lead to lung and throat tightening as is found in asthma and loss of voice.
A reaction that occurs when the immune system attacks a usually harmless substance (an allergen) that gains access to the body. The immune system calls upon a protective substance called immunoglobulin E (IgE) to fight these invading allergic substances ( allergens). Even though everyone has some IgE, an allergic person has an unusually large army of these IgE defenders -in fact, too many for their own good. This army of IgE antibodies attacks and engages the invading army of allergic substances of allergens. As is often the case in war, innocent bystanders are affected by this battle. These innocent bystanders are special cells called mast cells. These cells are frequently injured during the warring of the IgE antibodies and the allergic substances. When a mast cell is injured, it releases a variety of strong chemicals including histamine into the tissues and blood that frequently cause allergic reactions. These chemicals are very irritating and cause itching, swelling, and fluid leaking from cells. These allergic chemicals can cause muscle spasm and can lead to lung and throat tightening as is found in asthma and loss of voice.
| A Basic Guide to ASL |
Reaction
Both 'R'
hands are held before the face, with the right 'R' hand at the lips and behind the left 'R' hand. Both hands move forward simultaneously, describing a small upward arc.
Both 'R'
Reaction Definition from Entertainment & Music Dictionaries & Glossaries
| English to Federation-Standard Golic Vulcan |
Reaction
folaya
folaya
Reaction Definition from Encyclopedia Dictionaries & Glossaries
| Wikipedia English - The Free Encyclopedia |
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's third law
- Reflex reaction
- Reactionary, a political tendency
The word Reaction may also refer to:
- Reaction Records, a record label
- ReAction, an AmigaOS GUI
| See more at Wikipedia.org... |