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Lengua inglesa
reaction
noun
1 a response to stimulus.
2 an action or change in the opposite direction.
3 a complete change of opinions, feelings, etc to the opposite of what they were.
4 a response which shows how someone feels or thinks about something What was his reaction to the news?
5 opposition to change, especially political change, reform, etc, and a tendency to revert to a former system, or state of affairs.
6 physiol a physical or mental effect caused by eg a drug, medicines, etc.
7 chem
a a chemical process in which the electrons surrounding the nuclei in the atoms of one or more elements or compounds react to form one or more new compounds or products;
b chemical change.
8 physics a change in an atomic nucleus, eg radioactive decay, nuclear fission, nuclear fusion.
9 physics the force offered by a body that is equal in magnitude but opposite in direction to the force applied to it.
10 stock exchange a sharp fall in share prices, etc, after a rise.
[17c: from react]
reactional adjective .
© Hodder Education

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