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• n  the branch of electronics dealing with thermionic phenomena (especially thermionic vacuum tubes)

• He turned out some 300 articles on everything from thermionics to spectroscopy, helped found the American Institute of Physics, kept in constant touch with brother Arthur Holly .

News & Articles

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• Springfield manufacturer in Wal-Mart's 'Get on the Shelf' contest
  Thermionics Corp. has sold its wellness products from Wal-Mart shelves for years. But the Springfield manufacturer opted for an alternate route to that coveted retail space after Wal-Mart executives dragged their heels on committing to their newest product line.
  Aug. 18, 2013 - The State Journal-Register