control rod


noun
  1. a neutron-absorbing material, as boron or cadmium, in the shape of a rod or other configuration, that can be moved into or out of the core of a nuclear reactor to regulate the rate of fission.

Origin of control rod

1
First recorded in 1940–45

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British Dictionary definitions for control rod

control rod

noun
  1. one of a number of rods or tubes containing a neutron absorber, such as boron, that can be inserted into or retracted from the core of a nuclear reactor in order to control its rate of reaction

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