One of the mysteries of the English language finally explained.
Relating to electrons emitted from a substance at very high temperature.
- ‘The thorium dispersion enhances thermionic electron emission, which in turn improves the starting characteristics of gas tungsten arc welding electrodes.’
- ‘Electricity can be generated by the thermionic effect, that is, the use of dissimilar metals can cause electrons to flow in the presence of heat.’
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