Definition of reactor in English:

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Pronunciation: /rēˈaktər/


1 (also nuclear reactor) An apparatus or structure in which fissile material can be made to undergo a controlled, self-sustaining nuclear reaction with the consequent release of energy.
Example sentences
  • The difference between an atomic bomb and a nuclear reactor is in the speed and control of the release of energy.
  • The nuclear reactor releases energy in the form of heat which is used to generate steam, and the steam to generate electricity.
  • Commercial nuclear power reactors are clearly terror targets, particularly those near airports.
1.1A container or apparatus in which substances are made to react chemically, especially one in an industrial plant.
Example sentences
  • The dehydrogenation and selective hydrogenation reactors were run continuously and the product collected.
  • Solar receivers absorb this concentrated solar radiation and deliver it, in the form of high-temperature heat, to a chemical reactor wherein an endothermic reaction results in the production of solar fuels.
  • A green chemistry example concerns the transfer of raw polymer resin into reactors.
2 Medicine A person who shows an immune response to a specific antigen or an adverse reaction to a drug or other substance.
Example sentences
  • There is an urgent need to redefine the criteria for revaccination in abortive reactors who show preliminary response stages but do not develop a scar.
  • Production of IL - 12, IL - 4 and IL-IO was similar in TB patients and healthy tuberculin reactors.
  • The response of the eight reactors to the inhaled bronchodilator given at 6 hours (the end of the observation time) is shown in Figure 4.
3 Physics A coil or other component that provides reactance in a circuit.

For editors and proofreaders

Syllabification: re·ac·tor

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