Thermion
noun, Physics.
1.
an ion emitted by incandescent material.
noun
1.
(physics) an electron or ion emitted by a body at high temperature
thermion
(thûr’mī’ən)
An electrically charged particle or ion that is emitted by a heated conducting material. The electrons emitted from the cathodes of electron tubes (such as cathode ray tubes) are thermions.
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noun, Physics. 1. an ion emitted by incandescent material. adjective 1. of, relating to, or operated by electrons emitted from materials at high temperatures: a thermionic valve noun 1. (physics) an electron or ion emitted by a body at high temperature thermion (thûr’mī’ən) An electrically charged particle or ion that is emitted by a heated […]
- Thermionic-current
noun 1. an electric current produced by the flow of thermions. thermionic current noun 1. an electric current produced between two electrodes as a result of electrons emitted by thermionic emission
- Thermionic emission
noun 1. the emission of electrons from very hot solids or liquids: used for producing electrons in valves, electron microscopes, X-ray tubes, etc
- Thermionics
noun, (used with a singular verb) 1. the branch of physics that deals with thermionic phenomena. noun 1. (functioning as sing) the branch of electronics concerned with the emission of electrons by hot bodies and with devices based on this effect, esp the study and design of thermionic valves
- Thermionic-tube
noun, Electronics. 1. a vacuum tube in which the cathode is heated electrically to cause the emission of electrons by thermal agitation. thermionic tube (thûr’mī-ŏn’ĭk) An electrical component, typically an electron tube, through which electric current flows via the emission of thermions from a heated cathode.