Open Dictionary
Join now
mouse here to listen, click to choose/add more
Location: USA
Source: Learn That Word
Profile URL: www.learnthat.org
play again like it has problem

Are you a native English speaker? How do you pronounce this word?

Thank you for contributing!
upload mp3 file or record now it's easy, promised!

{%type%} Definitions

WordNet 3.0Copyright Princeton University
{%wordnet%}
Definitions.net
{%definitions_com%}

Videos

Click here to upload you own video for this word!
Short "hint"

n. - The branch of the science of matter and energy and their interactions dealing with the phenomena of electrically charged particles, especially electrons, emitted by a conducting material at high temperatures.

edit
Usage examples (6)
  • During the same period researches were carried on in thermal radiation with the collaboration of Mr. J.R. Weeks, and in thermionics with Dr. H.A. Pidgeon and Dr. Germer.
  • He was awarded the Hughes Medal by the Royal Society (1920), especially for work on thermionics; elected President, Section A, of the British Association (1921) and...
  • Since 1914 he worked at thermionics, photoelectric effects, magnetism, the emission of electrons by chemical action, the theory of electrons, the quantum theory, the...
  • Attached is a document setting out the basics for Curled Ballistic thermionics.
...click for more
Tutoring comment


Tutoring comment not yet available...

add more
wordnik merriam-webster
The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google, Wordnik.com, Dictionary.com, Stands4.com and YouTube, OEDILF.com, Kylescholz.com, Best-Practice.com, Forvo.com, as well as the generous Creative Commons community.

LearnThatWord and the Open Dictionary of English are programs by LearnThat Foundation, a 501(c)3 nonprofit.

Questions? Feedback? We want to hear from you!
Email us or click here for instant support.

Copyright © 2005 and after - LearnThat Foundation. Patents pending.