| NOUN | object | thermion | an electrically charged particle (electron or ion) emitted by a substance at a high temperature |
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| Meaning | An electrically charged particle (electron or ion) emitted by a substance at a high temperature. | |
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| Broader | particle, subatomic particle | A body having finite mass and internal structure but negligible dimensions |
| Spanish | termión | |
| Catalan | termió | |
| Adjectives | thermionic | of or relating to or characteristic of thermions |
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