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| re·ac·tion [ ree áksh'n ] (plural re·ac·tions) |
noun |
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| Definition: |
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1. emotional response: an emotional or intellectual response that something arouses
  My initial reaction was to laugh.
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2. active response: a response to something that involves taking action, or an action taken in response to something
Prices jumped in reaction to rumors of a shortage.
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3. opposing action: an act in opposition to somebody or something
a reaction against consumerism
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4. physical response: a response to the physical effects of something such as heat, cold, or pollution
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5. medicine bodily response to substance: a bodily response to a foreign substance such as an infectious agent, medication, or allergen
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6. politics strong conservatism: opposition to progressive social or political change
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7. physics forces acting on body: an equal but opposite force exerted by a body when a force acts upon it
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8. energy nuclear process: a nuclear process resulting in a change in the structure of atomic nuclei
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| re·ac·tion·al adjective |
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