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thermal reactor
thermal shock
thermal stress
thermalize
thermesthesia
-thermic
thermic
thermic lance
thermion
thermionic current
thermionic emission
thermionic tube
thermionic valve
thermionics
thermistor
thermite process
thermo-
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thermion

therm·i·on [ thúr m ən ] (plural therm·i·ons)


noun 
Definition:
 
positive ion or electron: a positive ion or electron given off by a very hot material such as a hot cathode


therm·i·on·ic [ thùrmee ónnik ] adjective
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