- an electron or ion emitted by a body at high temperature
| 单词 | thermion |
| 释义 | WordReference Random House Unabridged Dictionary of American English © 2024 therm•i•on (thûrm′ī′ən, -on; thûr′mē ən),USA pronunciation n. [Physics.]
therm′i•on′i•cal•ly, adv. Collins Concise English Dictionary © HarperCollins Publishers:: thermion /ˈθɜːmɪən/ n
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