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| the amount of a given fissionable material necessary to sustain a chain reaction at a constant rate |
| a progressive disturbance propagated in a medium without progress or advance by the points themselves, as in the transmission of sound or light |
| diamagnetism (dī'ə-māg'nĭ-tĭz'əm) Pronunciation Key
The property of being repelled by both poles of a magnet. Most substances commonly considered to be nonmagnetic, such as water, are actually diamagnetic. Though diamagnetism is a very weak effect compared with ferromagnetism and paramagnetism, it can be used to levitate objects. Compare ferromagnetism, paramagnetism. See also Lenz's law. diamagnetic adjective (dī'ə-māg-nět'ĭk) |